| RF Photonics Materials and Devices |
17 SEP 2004 |
41 pages |
| Authors:
Ming C. Wu; Harold Fetterman; Tatsuo Itoh; Bahram Jalali; Eli Yablonovitch; CALIFORNIA UNIV LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
|
 | Our MURI research team has developed several innovative materials and devices that would enable a quantum leap in the performance of RF Photonic systems. We have also applied these devices to several novel system concepts and achieved world record performances. In the material development, we have produced new electro-optic polymers with record high electro-optic coefficients (r33 = 60 pm/v at 1330 nm and 45 pm/v at 1550 nm wavelengths), low ... |
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| Photosynthetic Complexes: Molecularly Activated Bioswitches and Agents for Light Powered Molecular Circuitry |
11 SEP 2004 |
22 pages |
| Authors:
Stephen R. Forrest; Marc Baldo; PRINCETON UNIV NJ
|
| This program was directed at demonstrating functional optoelectronic devices by contacting individual, highly photoactive molecules of biological origin. This 2 phase program (each phase duration of 1 year), successfully addressed the fundamental engineering issues associated with the application of protein/molecular aggregates to electronic devices: purification of the complexes, and their interconnection to conventional bulk organic circuitry. We have demonstrated a molecular power source using a single antenna complex extracted from ... |
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| Opto-Electronic Oscillator Stabilized By A Hyperfine Atomic Transition |
SEP 2004 |
11 pages |
| Authors:
Dmitry Strekalov; David Aveline; Andrey B. Matsko; Robert Thompson; Nan Yu; CALIFORNIA INST OF TECH PASADENA JET PROPULSION LAB
|
| Opto-electronic oscillator (OEO) is a closed-loop system with part of the loop is implemented by an optical beam, and the rest by RF circuitry. The technological advantage of this approach over traditional all-RF loops in the gigahertz range comes from the that frequency filtering can be done far more efficiently in the optical range with compact, low power, and have superior stability. In this work, we report our preliminary results ... |
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| High Luminance and Efficient GaN:Eu Inorganic EL Devices for Monochromatic Display Applications |
SEP 2004 |
4 pages |
| Authors:
Chanaka Munasinghe; Andrew Steckl; CINCINNATI UNIV OH NANOELECTRONICS LAB
|
| In this paper we report GaN:Eu AC-TDEL devices with high luminance and high efficiency levels obtained through optimized phosphor growth techniques and device structure. The GaN:Eu phosphor is grown using interrupted growth epitaxy (IGE[Trademark]). An improved thick dielectric layer (TDEL) for inorganic electroluminescent (EL) display devices has been achieved through a composite high-Kappa dielectric sol-gel/powder route. The reduction in thick dielectric porosity has improved the homogeneity of the electric field ... |
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| Investigating Issues of Display Content vs. Clutter During Air-to-Ground Targeting Missions |
Sep-2004 |
6 pages |
| Authors:
Maura C Lohrenz; R J Hansman; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| This paper investigates competing influences of display content and clutter on pilot performance during flight guidance and target acquisition phases of air-to-ground targeting missions. Based on interviews with F/A-18 pilots, a cognitive process model is presented to help understand how pilots use and transition between internal and external sources of information to support decision-making and aircraft control. Experiments were conducted in which subjects flew targeting missions using a flight simulator ... |
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| Terahertz Time Domain Spectroscopy of Conformational Dynamics of Sensor Proteins: Basic Research and Pathogen Sensor Development |
31 AUG 2004 |
12 pages |
| Authors:
Andrea G. Markelz; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF PHYSICS
|
| We report on the research funded in part by this ARO grant towards developing an all-optical terahertz biosensor. This program is motivated by the need for fast and adaptable biosensors that do not require probe labeling. Our sensors are based on an intrinsic change in the probe molecule's physical characteristics upon target binding, namely the THz absorption. The proposed sensor consists of a compact THz spectroscopy system based on electro-optic ... |
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| Photonic Crystal Chip-Scale Optical Networks |
13 AUG 2004 |
5 pages |
| Authors:
Dobson; SILICON OPTICS INC DRAPER UT
|
| We have invented a new approach to minimize losses in PC components through the use of vertical mode matching within the slab and lower index pillars, such that out of plane scattering is virtually eliminated. We are also investigating methods to incorporate this technique into SQ1-based systems. Ultimately (Phase 11), the types of PC components we plan to build are based upon the ability of PC structures to modify of ... |
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| Study of Optoelectronics Properties of Anisotropic Semiconductor Compounds with Ordered Stochiometric Vacancy |
AUG 2004 |
57 pages |
| Authors:
Iouri Roud; SCIENTIFIC ENGINEERING CENTER FOR MICROELECTRONICS AT IOFFE INST ST PETERSBURG (RUSSIA)
|
| This report results from a contract tasking loffe Institute as follows: The main aim of the project is to carry out basic research on optoelectronic properties of CdGeAs2 and (Zn,Cd,Hg)(Ga,Al,ln)2(S,Se,Te)4 materials and to supply samples of these materials to the US AFRL/ML. This research include measurements of X-ray diffraction as well as spectra of polarized first- and second-order Raman scattering by lattice vibrations photoconductivity. and photoluminescence measurements in a temperature ... |
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| A Software Testbed for Display Evaluation |
AUG 2004 |
14 pages |
| Authors:
Matthew S. Middendorf; Nicole M. Guilliams; Annie B. McLaughlin; MIDDENDORF SCIENTIFIC SERVICES INC MEDWAY OH
|
| The purpose of this report is to make publicly available a software application testbed and its user manual that enable research on visual displays using a battery of tasks. The software currently employs two tasks, a multi- element tracking task and a cognitive vigilance task, which support research on attention and visual tracking. The software was developed for a multi-layer (depth) display, but also supports single or side-by-side monitors. The ... |
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| Exploiting the Cognitive and Social Benefits of Physically Large Displays |
AUG 2004 |
|
| Authors:
Desney S. Tan; CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF COMPUTER SCIENCE
|
 | There exists an emerging trend in the workplace towards multiple display systems. Within these workplaces, large wall-sized displays are becoming prevalent. Although researchers have articulated qualitative benefits of large displays, little has been done to systematically quantify and exploit these benefits. My work is composed of three distinct components, each contributing to an improved understanding of physically large displays. First, I isolate and study specific cognitive benefits unique to large ... |
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| Characterization of Polyaniline Based Polymer Light-Emitting Devices During Operation by Electrical Impedance Spectroscopy |
JUL 2004 |
3 pages |
| Authors:
J. Posdorfer; B. Wessling; ORMECON GMBH AMMERSBEK (GERMANY)
|
| Polyaniline was used as hole injection material for polymer light emitting devices (PLED) spin coated from a water based polyaniline/polystyrenesulfonate (Pani/PSS) dispersion. Data presented here were based on red, yellow, green and blue light emitting polymers (LEP). Depending on the applied bias voltages, the devices were studied by electrical impedance spectroscopy (EIS) in a wide frequency range. Experimental data could only be fitted by applying an equivalent circuit consisting of ... |
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| Advanced Fabrication and Characterization of Quantum and Nanophotonic Devices and Systems |
30 JUN 2004 |
23 pages |
| Authors:
Y. Fainman; CALIFORNIA UNIV REGENTS SAN DIEGO LA JOLLA CA
|
| The program completed its acquisition of equipment for the Micro- Fabrication Facility. The facility is used for fabrication of Quantum and Nanophotonic devices and consists of a CAIBE system capable of sub- micron resolution anisotropic (i.e. high aspect-ratio) etching and a RIE refurbished by INTELVAC Inc. A major capability is a facility for near field complex amplitude characterization with nanoscale spatial and femtosecond scale time resolution for nanophotonics applications. This ... |
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| Advanced Thermophotovoltaic Cells Modeling, Optimized for Use in Radioisotope Thermoelectric Generators (RTGs) for Mars and Deep Space Missions |
JUN 2004 |
131 pages |
| Authors:
Bradley P. Davenport; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| To accommodate the need for power on deep space missions, satellites must carry a source capable of providing adequate power for the life of the mission. This is currently done using radioisotope thermoelectric generators (RTGs). Current RTGs consist of a heat source, Pu-238, and a thermocouple that inefficiently converts heat into electricity. To improve the overall efficiency of RTGs, a better thermoelectric converter is needed to replace the thermocouple. This ... |
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| Symposium Y: GaN and Related Alloys |
17 MAY 2004 |
53 pages |
| Authors:
Michael Wraback; Hock M. Ng; Kazumasa Hiramatsu; Nicolas Grandjean; MATERIALS RESEARCH SOCIETY WARRENDALE PA
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| Effects of Scale-Hierarchy in Ordered Electro-Active Polymer Nanocomposites |
15 MAY 2004 |
20 pages |
| Authors:
CLEMSON UNIV SC SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
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| Electroactive nanocomposites are generally composed of a "minority" nanophase and a majority-phase host. Interaction between the phases is three fold: exchange of charge mediation of radiative energy, and morphological based on energy minimization. The mesostructure of the nanophase can strongly influence the properties of the composite to the point of being totally dissimilar to the original pure organic. This program was intended to introduce levels of order from studies of ... |
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| Biotechnology Route to Conformal Photovoltaics |
12 MAY 2004 |
19 pages |
| Authors:
Jayant Kumar; Sukant Tripathy; MASSACHUSETTS UNIV LOWELL
|
| The focus of this proposal is to develop biotechnological approaches for the synthesis of efficient dye sensitizers and redox polyelectrolytes in an environmentally benign way using enzymatic or biomimetic techniques. To further develop processing techniques to fabricate photovoltaic cells on thin conformable substrates and to test the dyes and polyelectrolytes thus prepared in realistic device configurations and establish close collaboration with a company to transition the results of the research. ... |
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| Strongly Modulated Photonic Crystal With Tailor Made Negative Refractive Index |
10 MAY 2004 |
10 pages |
| Authors:
P. Vodo; V. Parimi; W. T. Lu; S. Sridhar; NORTHEASTERN UNIV BOSTON MA
|
| Negative refraction and left-handed electromagnetism in a metallic photonic crystal (PC) wedge are demonstrated in free space for both transverse magnetic and electric mode propagation. The experimental results are in excellent agreement with numerical calculations based on the band structure with no fit parameters used in modeling. The results demonstrate precision control on the design and fabrication of the PC to achieve tailor-made refractive indices between -0.6 to +1. |
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| Multispectral Measurements in the Surf Zone |
07 MAY 2004 |
10 pages |
| Authors:
Jon Schoonmaker; Joseph Dirbas; Gary Gilbert; PAR GOVERNMENT SYSTEMS CORP LA JOLLA CA
|
| Over the past year an index has been defined which quantifies the surf zone with respect to an electro-optical (EO) system's ability to find targets. The purpose of this index is to both normalize the EO Mine Counter Measure (MCM) systems performance expectations to the environment in which it is tested and to assess the value of its performance in an operational environment. For example if a given system has ... |
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| Macromolecular Antennas and Photovotaics |
07 MAY 2004 |
10 pages |
| Authors:
Jean M. Frechet; CALIFORNIA UNIV REGENTS BERKLEY
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| This report explores the preparation of photovoltaic devices with enhanced light harvesting characteristics. In particular plastic hybrid photovoltaic devices based on electroactive polymer/inorganic components are studied. Significant advances were made in polymer-nanocrystal as well as polymer-titania photovoltaic devices through the development of novel polythiophenes that enhance both the interface and electronic communications between the polymer and the inorganic. |
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| Synthesis and Characterization of Novel Organic Conducting Polymers |
05 MAY 2004 |
37 pages |
| Authors:
Katherine E. Folz; NAVAL ACADEMY ANNAPOLIS MD
|
| The last two years have seen an extraordinary growth of interest in photovoltaic (PV) cells made from organic conducting polymers. Such attention stems primarily from the prospect of using organic materials in manufacturing ultra thin, flexible devices. Polymeric photovoltaic cells also present a tantalizing possibility for producing coatings that function as sunlight- harvesting paints or even for developing fabrics to produce electricity from sunlight. The U.S. Navy developed an interest ... |
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| A Wavelength Multiplexed Bidirectional Fiber Ring Network |
03 MAY 2004 |
45 pages |
| Authors:
Adam Fisher; NAVAL ACADEMY ANNAPOLIS MD
|
| In this project, an eight-node optical fiber ring network was built that functions as a precursor to a local area network. The network uses four wavelength division multiplexed (WDM) channels and eight bidirectional add-drop multiplexers (BADM) to route analog or digital data between individual nodes. Specific wavelength channels are routed bi-directionally through the eight nodes, minimizing the number of hops a message must take to reach its destination. Information on ... |
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| Resonant Enhanced Modulators |
MAY 2004 |
453 pages |
| Authors:
J. H. Abeles; A. N. Lepore; M. H. Kwakernaak; H. Mohseni; G. A. Pajer; SARNOFF CORP PRINCETON NJ
|
| We developed fabrication technology, advanced materials and design techniques to realize resonance enhanced modulators with ring-resonators. The devices are based on a lateral geometry with deeply etched waveguides in InP. ICP etching techniques and masks were developed to obtain sub-micrometer deep etched waveguides with nanometer residual sidewall roughness for low optical loss and high quality resonators. Ultra compact multi-mode interference (MMI) couplers are designed and fabricated for coupling of the ... |
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| Opto-Electronic and Interconnects Hierarchical Design Automation System (OE-IDEAS) |
MAY 2004 |
135 pages |
| Authors:
M. Turowski; A. Przekwas; R. Tramel; H. Q. Yang; H. Ding; CFD RESEARCH CORP HUNTSVILLE AL
|
| As microelectronics technology continues to advance, the associated electrical interconnection technology is not likely to keep pace, due to many parasitic effects appearing in metallic interconnections. Hence, the optical interconnections and photonic-electronic chips seem to be the most viable technology for future multi-GHz mixed-signal electronics. Therefore, this project developed, demonstrated, and validated Design Tools for Opto-Electronic Integrated Circuits and Interconnects. The two crucial issues are the efficient and fast techniques ... |
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| Synthesis of Superhard Thin Films and Coatings Based on Light Elements |
18 APR 2004 |
8 pages |
| Authors:
J. Kouvetakis; I. S. Tsong; ARIZONA STATE UNIV TEMPE ARIZONA BOARDOF REGENTS
|
| Superhard dielectric and optoelectronic materials in the Si-C-Al-N si-B-O-N and Zr-B/Ga-N systems were prepared as thin films via novel CVD and MBE routes. SiC and AlN, normally insoluble in each other below 2000 deg C are combined to form single phase SiCAlN by gas source MBE of SiH3CN and Al atoms at 75000. The growth of epitaxial material takes place on 6H SiC and Si(111). Commensurate heteroepitaxy between Si(111) and ... |
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| Monolithic Integration of Microfluidics and Optoelectronics for Biological Analysis |
15 APR 2004 |
3 pages |
| Authors:
Axel Scherer; Stephen Quake; CALIFORNIA INST OF TECH PASADENA
|
| We have integrated microfluidic structures with optoelectronic lasers in the same device. Very sensitive and ultra-small laser sensors could be connected to fluidic systems by using microfluidic multiplexing technology and replication molded microfluidic chips. The basis of our sensor is a two- dimensional photonic crystal laser with an unusual cavity geometry that permits the introduction of analyte into the highest optical field region. This photonic crystal laser sensor can measure ... |
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| Pupil Plane Array Based Millimeter-Wave Imaging Radiometer |
APR 2004 |
28 pages |
| Authors:
Stuart Clark; John Lovberg; Vladimir Kolinko; Chris Martin; John McCoy; TREX ENTERPRISES SAN DIEGO CA
|
| The work performed under this contract was related to the testing and procurement of the phase and, in particular, frequency processor boards that are needed in Trex Enterprises' second generation real-time passive millimeter-wave camera (PMC). In addition, an imaging demonstration performed under this contract demonstrated the feasibility of building such a PMC and that it is possible to obtain near diffraction limited imagery. The Trex Enterprises Corporation's PMC imager uses ... |
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| Synthesis and Characterization of Polyimides to be Used in the Fabrication of a Low Driving Voltage Electro-Optic Modulator |
APR 2004 |
44 pages |
| Authors:
Connie Walton; Sergey Sarkisov; GRAMBLING STATE UNIV LA
|
| The aim of this project was to synthesize polyimides that exhibit second order nonlinear optic behavior and to fabricate a Low Driving Voltage Electro-optic Modulator. Undergraduate and graduate students were involved in all aspects of this project. A high temperature polyimide that had a NLO chromophore incorporated was synthesized and its properties characterized. The E-O Coefficient of the polyimide was determined to be 1.98pm/V and expected to have a driving ... |
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| Advancement of Polymer Detectors for Space Applications |
16 MAR 2004 |
81 pages |
| Authors:
Edward W. Taylor; Tingying Zeng; Richard O. Claus; INTERNATIONAL PHOTONICS CONSULTANTS INCPAGOSA SPRINGS CO
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| Photovoltaic polymer detectors incorporating Indium Phosphide (InP) and Cadmiume Selenide (CdSe) quantum dots (QDs) were fabricated, characterized for their open circuit voltage and short circuit currents and studied for radiation resistance. InP QD detectors exhibited higher photovoltages and responded further into the near-IR compared to CdSe QD detectors, however, the CdSe QD detectors exhibited higher external quantum efficiencies than InP QD detectors. InP QD detectors showed excellent resistance to gamma-ray ... |
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| Nanocomposite Materials and Microstructured Devices for Optical Limiting and Switching and Photovoltaic Applications |
12 MAR 2004 |
40 pages |
| Authors:
Joseph Perry; Jean-Luc Bredas; Bernard Kippelen; Seth R. Marder; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
|
| This is a multi-investigator program, involving an integrated theory and modeling, synthesis, nonlinear optical spectroscopy, and electronic characterization effort, that is being undertaken by the Perry, Bredas, Kippelen and Marder groups. The activities being pursued under this AFOSR program are: 1) development two-photon absorbing molecules with large two-photon cross sections and excited-state absorption cross sections for optical power limiting applications, 2) chromophore/ nanoparticle assemblies with enhanced nonlinearity for optical power ... |
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| Special Technology Area Review on Displays. Report of Department of Defense Advisory Group on Electron Devices Working Group C (Electro-Optics) |
MAR 2004 |
123 pages |
| Authors:
Susan Turnbach; Andrew Yang; Darrel G. Hopper; OFFICE OF THE UNDER SECRETARY OF DEFENSE FOR ACQUISITION TECHNOLOGY AND LOGISTICS WASHINGTON DC
|
| Displays are critical devices in all weapons systems. Sensors and information systems enable warfighters to detect, locate, identify, and track targets, assure accurate real-time battlespace situational awareness, and provide an accurate battlefield damage assessment -- but only if there is a display at the location of each and every friendly combatant. Display research spawns whole new fields as a result of its multidisciplinary nature; for example, the cathode ray tube ... |
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| Solid State Research |
15 FEB 2004 |
|
| Authors:
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| This report covers in detail the research work of the Solid State Division at Lincoln Laboratory for the period 1 November 2003 through 31 January 2004. The topics covered are Quantum Electronics, Electro-optical Materials and Devices, Submicrometer Technology, Biosensor and Molecular Technologies, Advanced Imaging Technology, Analog Device Technology, and Advanced Silicon Technology. Funding is provided by several DoD organizations- including the Air Force, Army, DARPA, MDA, Navy, NSA, and OSD-and ... |
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| Study of Linearization of Optical Polymer Modulators |
FEB 2004 |
26 pages |
| Authors:
Anand Gopinath; Ross Schermer; Jaesang Oh; Desalegn Bereka; MINNESOTA UNIV MINNEAPOLIS
|
| To improve the Spur Free Dynamic Range of analog electro-optic modulators in the >10 GHz regime, techniques for improving the linearity of these devices must be developed. This report discusses an investigation into electro-optic directional couplers that use variable coupling in polymer-based waveguide structures. The approach begins with determining the desired response function, in this case a trapezoid. The Fourier transform method is then applied to synthesize the variable coupling ... |
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| DEEPER: Discovery and Exploitation of Emergent Physics through Evolutionary Refinement |
FEB 2004 |
13 pages |
| Authors:
Julian F. Miller; Simon Harding; YORK UNIV (UNITED KINGDOM)
|
| The DEEPER project aims to see if artificial evolution can create entirely new technologies, such as transistor-less circuits for sophisticated technological applications. The project is likely to have high impact in basic science. Using artificial evolution to explore "bottom-up" may lead to devices with significant advantages in size/weight ratio, fault tolerance, radiation tolerance, and speed of response. The project objectives are as follows: (1) to build and test an intrinsic ... |
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| Ultrafast Optical Encryption and Waveform Recognition Using Space-Time Optical Engineering |
27 JAN 2004 |
10 pages |
| Authors:
Andrew M. Weiner; PURDUE UNIV LAFAYETTE IN SCHOOL OF ELECTRICAL AND COMPUTER ENGINERING
|
| Our overall objective is to demonstrate powerful new signal processing functionalities for ultrafast optical signals, with an emphasis on proof-of-concept experiments of new space-time (parallel-serial) optical processing methods. A key goal is to develop efficient methods for parallel- serial conversion of ultrafast optical signals, with potential application as an enabler for subsystems performing digital logic operations on ultrafast optical bit streams, especially encryption and temporal pattern matching operations. In particular, ... |
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| An Initial Evaluation of Video-based Fire Detection Technologies (CD-ROM) |
09 JAN 2004 |
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| Authors:
Daniel T. Gottuk; Matthew Harrison; Joseph L. Scheffey; Susan L. Rose-Pehrsson; Frederick W. Williams; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
|
| ELECTRONIC FILE CHARACTERISTICS: 1 file; MS Word (.DOC). PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 5.66 MB and a hardcopy report. SYSTEMS DETAIL NOTE: ABSTRACT: Computer processing and image analysis technologies have improved significantly to allow the recent development of effective video-based fire detection systems. Currently, smoke detection algorithms are the most mature. Typically, these systems are being designed and used in large facilities, outdoor ... |
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| Design and Characterization of MEMS Optical Microphone for Aeroacoustic Measurement |
JAN 2004 |
11 pages |
| Authors:
K. Kadirvel; R. Taylor; S. Horowitz; L. Hunt; M. Sheplak; FLORIDA UNIV GAINESVILLE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This paper presents the design and characterization of an intensity modulated optical lever microphone. Optical microphones (OM) have an inherent immunity to environments hostile to electronics due to the spatial separation of the electronics and the acoustic field under test. Theoretical equations for the sensitivity, minimum detectable signal, and frequency response are presented. Physical phenomena responsible for limiting the microphone minimum detectable signal (MDS) are identified, and a model is ... |
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| Diamond-Shaped Semiconductor Ring Lasers for Analog to Digital Photonic Converters |
JAN 2004 |
19 pages |
| Authors:
Malcolm Green; AIR FORCE RESEARCH LAB ROME NY SENSORSDIRECTORATE
|
| Photonic/ optoelectronic analog to digital converters (ADCs) have advantages in areas such as precise sampling times, narrow sampling apertures, and the ability to sample without contaminating the incident signal. They also have potential to offer the highest sampling rates and bandwidths. Significant challenges remain in the development of photonic ADC architectures and associated components (e.g. compactness, reduce power consumption v. efficiency, improved mechanical and thermal stability, etc.). Monolithically integrated photonic ... |
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| Physics and Simulation of Optoelectronic Devices XII |
JAN 2004 |
487 pages |
| Authors:
Marek Osinski; Hiroshi Amano; Fritz Henneberger; SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS BELLINGHAM WA
|
| Papers on Novel Nanostructures and Optoelectronic Devices, Physics of Quantum Dot Lasers, Simulation of Fiber Devices and Optical Waveguides, Optical Communications, Diode Laser Simulation, VCSels and Resonant-Cavity Photodiodes, Physics of Low Dimensional Structures and Devices, Chaos Synchronization in Diode Lasers, Diode Lasers with Optical Feedback and Wide Bandgap/Visible Materials and Devices. |
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| 0.5-micrometers CMOS Orthogonal Encoding Readout Cell for Active Imaging Systems |
Jan-2004 |
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| Authors:
Fouad Kiamilev; Jorge A Garcia; William Lawler; Nicholas Waite; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL ENGINEERING
|
| We propose a novel continuous-time simultaneous- readout scheme for active imaging systems based on orthogonal modulation of photodetector signals. The superimposed- continuous-time approach presented here differs from the conventional scheduled-discrete-time scheme in that the photodetector signals are summed in a common bus and read concurrently. We show how that our proposed architecture may be advantageous, particularly in applications where bandwidth requirements for a time-multiplexed scheme are highly demanding. The active ... |
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| Road to Intelligent Optical Devices: Instrumentation for Characterization of Optical Materials |
2004 |
5 pages |
| Authors:
Hailin Wang; Miriam Deutsch; OREGON UNIV EUGENE DEPT OF PHYSICS
|
| Equipment acquired and preliminary research results utilizing the equipment are reported. A synchronously-pumped optical parametric oscillator and a regenerative Ti:Sapphire amplifier system, both from Coherent, Inc., have been acquired and installed. The equipment has been used for optical characterization of metallo-dielectric photonic crystals (MDPCs) and for realization of electromagnetically-induced transparency (EIT) in semiconductor heterostructures. Ordered MDPCs have been successfully fabricated via colloidal assembly. EIT in semiconductors have been demonstrated for ... |
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| Multiscale Modeling of Complex Physics: Fluids Solids and Optics |
2004 |
18 pages |
| Authors:
James Glimm; STATE UNIV OF NEW YORK AT STONY BROOK RESEARCH FOUNDATION
|
| Algorithms, simulations and modeling for fluid mixing and complex flow were developed. Our front tracking algorithm was improved for its accuracy and conservation properties. Local mesh refinement was added. Simulations in agreement with experiment were obtained. New models of the fluid mixing process were derived, which were also compared to experimental data. |
|
| Direct Observation of the Evolution of Both the HOMO and LUMO Energy Levels of a Silole Derivative at a Magnesium/Silole Interface |
2004 |
10 pages |
| Authors:
N. J. Watkins; A. J. Maekinen; Y. Gao; M. Uchida; Z. H. Kafafi; NAVAL RESEARCH LAB WASHINGTON DC
|
| The electronic structure of the interface formed by Mg deposition onto 2,5-bis(6 -(2 ,2 -bipyridyl))-1,1-dimethyl-3,4- diphenyl silacyclopentadiene (PyPySPyPy) was investigated using ultraviolet, inverse, and X-ray photoemission spectroscopies. PyPySPyPy is of interest for use as an electron injection/transport layer in high efficiency organic lightemitting diodes. Upon deposition of Mg onto PyPySPyPy there is a shift of the occupied energy level structure to higher binding energy, away from the Fermi level, and ... |
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| Experimental Implementation of a Model-Based Inverse Filter to Attenuate Hysteresis in an Atomic Force Microscope |
2004 |
7 pages |
| Authors:
Andrew Hatch; Ralph G. Smith; Tathagata De; NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION
|
| This paper addresses the development and experimental validation of a model-based, open loop control design for mitigating the frequency-dependent effects of hysteresis in an atomic force microscope (AFM). The models are based on homogenized energy relations which characterize the hysteretic constitutive behavior of the piezoceramic AFM stage. Approximate model inverses are then employed as filters to linearize transducer dynamics for control design. When experimentally implemented in open loop control designs, ... |
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| High-Power Optical Microswitch Based on Direct Fiber Actuation |
2004 |
|
| Authors:
Kevin R. Cochran; Lawrence Fan; Don L. DeVoe; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
|
| An optical microswitch is presented for high-power switching applications. The device, capable of switching several watts of optical power, employs large-core multimode fibers to switch output from a laser diode operating at a wavelength of 810 nm. Switching is achieved through the direct deflection of an on-chip fiber using a high force electrothermal actuator. Optical losses in the system are identified, and optical efficiency is predicted and verified with experimental ... |
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| Long Wavelength Video-Based Event Detection, Preliminary Results from the CVNX and VS1 Test Series, Ex-USS SHADWELL, April 7-25, 2003 |
30 DEC 2003 |
50 pages |
| Authors:
Daniel A. Steinhurst; Christian P. Minor; Jeffrey C. Owrutsky; Susan L. Rose-Pehrsson; Daniel T. Gottuk; NAVAL RESEARCH LAB WASHINGTON DC
|
| This report documents results from long wavelength-response, or night vision video detection (LWVD) of fire, smoke, and hot objects obtained during the CVNX and VS1 Test Series. The cameras demonstrated thermal imaging capabilities and an enhanced sensitivity to flaming fires and other hot objects when compared to co-located regular video cameras. Video event detection with long wavelength cameras is discussed and compared with the results of video event detection systems ... |
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| Long Wavelength Video-Based Event Detection, Preliminary Results from the CVNX and VS1 Test Series, ex-USS Shadwell, April 7-25, 2003 (CD-ROM) |
30 DEC 2003 |
|
| Authors:
Daniel A. Steinhurst; Christian P. Minor; Jeffrey C. Owrutsky; Susan L. Rose-Pehrsson; Daniel T. Gottuk; NAVAL RESEARCH LAB WASHINGTON DC CHEMICAL DYNAMICS AND DIAGNOSTICS BRANCH
|
| ELECTRONIC FILE CHARACTERISTICS: 36 files; Adobe Acrobat (.PDF), MS Excel (.XLS) and Audio Video Interleave (.AVI). PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 611 MB. SYSTEMS DETAIL NOTE: ABSTRACT: This report documents results from long wavelength-response, or nightvision video detection (LWVD) of fire, smoke, and hot objects obtained during the CVNX and VS1 Test Series. The cameras demonstrated thermal imaging capabilities and an enhanced sensitivity to ... |
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| Adaptive Optoelectronic Eye |
23 DEC 2003 |
53 pages |
| Authors:
Pallab Bhattacharya; MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| The objective of this multidisciplinary research program was to develop a versatile image sensor technology where advances in optical devices and merging of optoelectronic, micro-optic and micromechanical components would allow the feasibility of tightly coupled adaptive focal plan arrays. We adopted a layered architecture in which the essential elements were: The front-end optics consisting of a variable focus Fresnel lens, a microlens array and a microprism array for color dispersion ... |
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| Solid State Research Quarterly Technical Report 2003:3 |
18 DEC 2003 |
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| Authors:
David C. Shaver; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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| This report covers in detail the research work of the Solid State Division at Lincoln Laboratory for the period 1 May through 31 July 2003. Chapter 1, on quantum electronics, contains the paper "Widely Tunable, Aluminum- Free GaSb-Based, Mid-Infrared Semiconductor Lasers." Chapter 2, on electrooptical materials and devices, contains the paper "Model of Tunneling Resistivity between Bonded Semiconductor Wafers." Chapter 3, on submicrometer technology, contains two papers: "Method for Testing ... |
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| Zinc Oxide Based Photonics Devices |
09 DEC 2003 |
25 pages |
| Authors:
Yungryel Ryu; Henry W. White; MOXTRONICS INC COLUMBIA MO
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| The objectives of this project are to develop critical technologies required for ZnO-based photonic device; high-quality ZnO film growth, p/n-doping processes, etching processes, and fabrication of ZnO light emitting devices. We have developed such critical technologies% in this Phase I work. Prototype ZnO light emitting devices have been successfully fabricated and tested for a feasibility study to assess whether ZnO devices can satisfy the operational requirements as photonics devices to ... |
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| Electro-Optic Modulation and Mirrorless Lasing Using Unique Organic Materials and Single-Crystal Films |
05 DEC 2003 |
7 pages |
| Authors:
Mrinal Thakur; AUBURN UNIV AL DEPT OF MECHANICAL ENGINEERING
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| The accomplishments in this project include the following: (1) preparation of single-crystal films of specific organic nonlinear optical materials, including molecular salts such as DAST; (2) measurement of electro- optic coefficients; (3) demonstration of electro-optic modulation with a modulation depth of 80% at a field of 4 V/micrometers for a single-pass device (using a 3-micrometer thick film); (4) demonstration of high-speed modulation with a speed up to 1.5 GHz; (5) ... |
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Electrooptical and Optoelectronic Devices
