| Optical Spectroscopy and Multiphoton Imaging for the Diagnosis and Characterization of Hyperplasias in the Mouse Mammary Gland |
SEP 2005 |
34 pages |
| Authors:
Richard C. Angelini; WISCONSIN UNIV-MADISON
|
 | There is no reliable method for identifying pre- or non-malignant lesions in animal models of breast cancer in vivo and thus no method for studying carcinogenesis in vivo. The purpose of this project is to develop a method to diagnose mammary gland hyperplasias in an animal model in vivo using optical spectroscopy. The absorption and scattering parameters extracted from diffuse reflectance spectra measured in vivo in the 400-600 nm range ... |
|
| 3D Near Infrared Diffuse Wave Imaging With Ultrasound Localization |
SEP 2005 |
13 pages |
| Authors:
Minming Huang; Quing Zhu; CONNECTICUT UNIV STORRS
|
| This proposal is focused on the three-dimensional NIR imaging reconstruction using ultrasound localization for cancer detection and diagnosis. During the reported period, we have achieved simultaneous reconstruction of optical absorption and scattering coefficients of heterogeneities using a dual-mesh scheme based on finite element method, and introduced a new simple two-layer model to correct diffusive wave distortion caused by underlying chest wall of patients. |
|
| Modeling of Multi-Photon Excitations in Charge-Transfer Materials |
SEP 2005 |
3 pages |
| Authors:
Hans A. Agren; ROYAL INST OF TECH STOCKHOLM (SWEDEN)
|
| This report results from a contract tasking Royal Institute of Technology as follows: The aim of the present proposal is to develop and apply a computer code (DALTON) for studies of multiphoton excitations in charge-transfer materials. The basic technology is density functional response theory, originally developed by the Swedish partner, with the intend of this project to implement in such a way that it becomes practical for large scale accurate, ... |
|
| Cirrus Characterization for Laser Propagation and Global Modeling |
SEP 2005 |
75 pages |
| Authors:
John Hallett; Matt Bailey; DESERT RESEARCH INST RENO NV
|
| Laser beam propagation through the earth's atmosphere is influenced by absorption and scattering by ice crystals as occur in cirrus clouds. New instruments (cloudscopes) and laboratory chambers (thermal diffusion, fall tower) have been designed and built to characterize and simulate such crystals to measure absorption and scatter of laser beams. The cloudscope, deployed for aircraft or laboratory use, collects and video-records ice crystals to provide a measure of their size, ... |
|
| Design and Numerical Simulation of Two Dimensional Ultra Compact Combustor Model Sections for Experimental Observation of Cavity-Vane Flow Interactions |
SEP 2005 |
163 pages |
| Authors:
David S. Moenter; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF AERONAUTICS AND ASTRONAUTICS
|
| An improved computational fluid dynamics (CFD) model was developed for numerical simulation of the Ultra Compact Combustor (UCC) concept to enhance turbulent flow characterization of the circumferentially traveling, centrifugal-force enhanced combustion, cavity flow into the engine main flow passage via a radial cavity in the turbine axial guide vanes. The CFD model uses a dense grid on a 60 deg periodic, axisymmetric combustor section, with the RNG kappa-epsilon turbulence model ... |
|
| Semiconductor Nanocrystal Photonics |
31 AUG 2005 |
9 pages |
| Authors:
Todd D. Krauss; ROCHESTER UNIV NY OFFICE OF RESEARCH AND PROJECT ADMINISTRATION
|
| The overall objective of the project is to take advantage of the unique photon density of states of periodic structures to enhance the energy transfer between two sizes of semiconductor nanocrystals placed inside a planar optical microcavity. We have fabricated thin films of two sized CdSe nanocrystals with controllable thickness. These films show efficient energy transfer from the smaller to the larger nanocrystals as measured by steady state and time ... |
|
| Performance Test Results for the Laser-Powered Microthruster (PREPRINT) |
30 AUG 2005 |
13 pages |
| Authors:
Claude R. Phipps; James R. Luke; Wesley Helgeson; Richard Johnson; PHOTONIC ASSOCIATES SANTA FE NM
|
| Microthrusters are useful for orienting and repositioning small craft above the atmosphere. We report technical results obtained during a successful 5-year program to develop a commercially-viable laser-powered microthruster. Its main advantage is the ability to generate a broad thrust range under programmable electronic control with minimal electrical power. The device applies millisecond-duration diode-laser pulses to a fuel tape to produce an ablation jet. By employing laser-initiated energetic polymers in our ... |
|
| Analysis and Simulations of Optical Rectification as a Source of Terahertz Radiation |
15-Aug-2005 |
35 pages |
| Authors:
Daniel F Gordon; Phillip Sprangle; C A Kapetanakos; NAVAL RESEARCH LAB WASHINGTON DC
|
| The second order nonlinearity present in many crystals can be utilized to convert optical radiation into THz radiation via the optical rectification mechanism. This process becomes efficient if a phase matching condition is satisfied. The short pulses used for optical rectification can be more intense than the longer pulses used for difference frequency generation because of the pulse length dependence of the crystal's damage threshold. However, optical rectification is more ... |
|
| Design and Testing of a One-Meter Membrane Mirror with Active Boundary Control (Conference Proceedings) |
01 AUG 2005 |
9 pages |
| Authors:
James D. Moore; Brian G. Patrick; Surya Chodimella; Dan Marker; Brett DeBlonk; SRS TECHNOLOGIES HUNTSVILLE AL
|
| The use of thin film membranes is of considerable interest for lightweight mirror applications. The low areal density makes them ideal for Large aperture imaging applications. One type of setup looked into in the past has been the lenticular design. which consists of a clear Canopy attached to a reflective film that uses positive pressure to set the curvature of the mirror. One drawback to this concept has been the ... |
|
| Performance Measurements of a Self-Referencing Interferometer Wavefront Sensor with Optical Amplification (Preprint) |
29 JUL 2005 |
10 pages |
| Authors:
Laura Klein; Troy A. Rhoadarmer; AIR FORCE RESEARCH LAB KIRTLAND AFB NM DIRECTED ENERGY DIRECTORATE
|
| The Self-referencing Interferometer Wavefront Sensor (SRI WFS) has been shown to outperform conventional wavefront sensors in strong scintillation environments. Recently, the Starfire Optical Range has developed a prototype SRI to evaluate its performance. This paper discusses the purposes of optically amplifying the reference beam. Specifically, it addresses regions of operation where gain improves signal-to-noise ratio (SNR) values, and thus the SRI WFS performance. Conditions are also addresses when Amplified Spontaneous ... |
|
| Attenuation of Visible Solar Radiation in the Upper Water Column: A Model Based on IOPs |
25 JUL 2005 |
5 pages |
| Authors:
ZhongPing Lee; KePing Du; Robert Arnone; SooChin Liew; Bradley Penta; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| For many oceanic studies, it is required to know the distribution of visible solar radiation (EPAR) in the upper water column. One way to reach this is by remote sensing. This includes two components: First, EPAR at surface is calculated based on atmosphere properties along with the position of the Sun. Second, the vertical attenuation of EPAR (KPAR) is derived from products of ocean-color remote sensing. Currently, KPAR is estimated ... |
|
| In-Orbit Vicarious Calibration for Ocean Color and Aerosol Products |
25 JUL 2005 |
5 pages |
| Authors:
Menghua Wang; NOAA/NESDIS OFFICE OF RESEARCH AND APPLICATIONS CAMP SPRINGS MD
|
| It is well known that, to accurately retrieve the spectrum of the water-leaving radiance and derive the ocean color products from satellite sensors, a vicarious calibration procedure, which performs sensor in-orbit calibration for a whole system (the sensor and algorithms) is necessary. Both Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer (MODIS) have employed in-orbit vicarious calibration procedure that uses the in situ measurements with the Marine Optical ... |
|
| Statistics and Variability of Turbulence Dynamics in the Middle Atmosphere |
20 JUL 2005 |
45 pages |
| Authors:
|
| This project falls within the realm of the USAF mission of developing air defense systems, a component of which is the ongoing Airborne Laser (ABL) program. The recent congressional mandate to develop an airborne missile defense system for the US will bolster the ABL program, since laser technology is a viable tool for such an effort. One of the major challenges of the ABL program is the development of laser-beam ... |
|
| Low Phase Noise Fiber Optics Links for Space Applications |
13 JUL 2005 |
9 pages |
| Authors:
Bertrand Onillon; Stephanie Constant; Gianandrea Quardi; Benoit Benazet; Olivier Llopis; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE TOULOUSE (FRANCE) LAB DE METALLURGIE PHYSIQUE
|
| This paper summarises the results obtained on different systems dedicated to the optical distribution of high spectral purity RF and microwave signals in a satellite payload or towards the elements of an active antenna. First, the interest of the photo-oscillator receiver for these applications in the RF frequency range is pointed out. Then, different emitter configurations are investigated in the microwave range . Finally, an application of these low phase ... |
|
| Engineering Intersubband Nonlinearities in GaN/AlGaN Coupled Quantum Wells for Optimised Performance in wide Bandwidth Applications |
11 JUL 2005 |
4 pages |
| Authors:
Richard A. Soref; Gregory Sun; Jacob B. Khurgin; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
|
| We investigate nonlinear optical properties of coup led GaN/AlGaN quantum wells and show that one can engineer the response time and nonlinear phase shift within wide limits and thus achieve optimized performance for a given symbol rate. |
|
| Monitoring Cancer Oxygenation Changes Induced by Ultrasound |
JUL 2005 |
6 pages |
| Authors:
Anastasios Maurudis; Quing Zhu; CONNECTICUT UNIV STORRS
|
| Preliminary studies with 5 tumor-bearing rats performed by the original PI, Dr. Daqing Piao, demonstrated that ultrasonic vibrations could either generate significant effects (early stage tumors) on optical measurements or no effects on optical measurements (late stage tumors). During the first two years, the original PI had devoted his efforts on quantifying both acoustic vibration and optical measurement of oxygenation. He had completed the first two proposed tasks and partially ... |
|
| Development of Methods for the Real-Time and Rapid Identification and Detection of TSE in Living Animals Using Fluorescence Spectroscopy of the Eye |
JUL 2005 |
8 pages |
| Authors:
Jacob W. Petrich; IOWA STATE UNIV OF SCIENCE AND TECHNOLOGY AMES
|
| Transmissible spongiform encephalopathies (TSEs) are thought to be caused by the accumulation of abnormal protease-resistant proteins called prions, which are found in aging central nervous system tissue and in the eyes. Other protease-resistant compounds, collectively called lipofuscins, also accumulate in CNS. Lipofuscins accumulate in the eye, especially in the diseased eye. An increase in lipofuscin accumulation is known to occur in human Creutzfeldt-Jakob disease victims and in other cases of ... |
|
| A Study of the Self-Passivation of Space-Survivable POSS Kapton Polyimides |
JUL 2005 |
17 pages |
| Authors:
Sandra J. Tomczak; Vandana Vij; Tim Haddad; Darrell Marchant; Joe Mabry; AIR FORCE RESEARCH LAB EDWARDS AFB CA
|
| Briefing charts on a Study of the Self-Passivation of Space-Survivable POSS Kapton Polyimides. |
|
| Attenuation of Visible Solar Radiation in the Upper Water Column: A Model Based on IOPs |
JUL 2005 |
6 pages |
| Authors:
Zhong P. Lee; KePing Du; Robert Arnone; SooChin Liew; Bradley Penta; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| For many oceanic studies, it is required to know the distribution of visible solar radiation (EPAR) in the upper water column. One way to reach this is by remote sensing. This includes two components: First, EPAR at surface is calculated based on atmosphere properties along with the position of the Sun. Second, the vertical attenuation of EPAR (KPAR) is derived from products of ocean-color remote sensing. Currently, KPAR is estimated ... |
|
| Laterally Coupled Buried Heterostructure High-Q Ring Resonators |
01 JUN 2005 |
4 pages |
| Authors:
Seung J. Choi; Kostadin Djordjev; Zhen Peng; Qi Yang; Sang J. Choi; P. D. Dapkus; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING AND ELECTROPHYSICS
|
| All-buried InP-InGaAsP ring resonators laterally coupled to bus waveguides are demonstrated. The buried configurations offer a lower built-in refractive index step along the resonator periphery, which affords enhanced optical coupling coefficients between the waveguides and reduced scattering losses caused by the resonator sidewall imperfections. Very low optical intensity attenuations of 0.4 /cm and coupling-limited quality factors of greater than 10(exp 5) are observed from 200- micrometers-radii ring resonators. The measured ... |
|
| Novel Form Birefringence Modeling for an Ultracompact Sensor in Porous Silicon Films Using Polarization Interferometry |
01 JUN 2005 |
4 pages |
| Authors:
Beom-Hoan O; Chul-Hyun Choi; Soo-Beom Jo; Min-Woo Lee; Dong-Gue Park; Byeong-Gwon Kang; Sun-Hyung Kim; Rong Liu; Yang Y. Li; Michael J. Sailor; Yeshaiahu Fainman; INHA UNIV INCHEON (SOUTH KOREA)
|
| The optical form birefringence in porous silicon films is measured by analyzing the transmitted interference intensity of a polarization interferometer. A novel form birefringence model called "boundary condition (BC) model" for porous materials is introduced and evaluated experimentally against samples of porous silicon films. The variation of optical indexes of refraction vs the porosity in silicon films agrees with the calculated values of n(sub 0)/n(sub e) within 1% error using ... |
|
| Light Actuation of Liquid by Optoelectrowetting |
01 JUN 2005 |
8 pages |
| Authors:
Pei Y. Chiou; Hyejin Moon; Hiroshi Toshiyoshi; Chang-Jin Kim; Ming C. Wu; CALIFORNIA UNIV LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
|
| Optical actuation of liquid droplets has been experimentally demonstrated for the first time using a novel optoelectrowetting (OEW) principle. The optoelectrowetting surface is realized by integrating a photoconductive material underneath a two-dimensional array of electrowetting electrodes. Contact angle change as large as 30 degrees has been achieved when illuminated by a light beam with an intensity of 65 mW/sq cm. A micro-liter droplet of deionized water has been successfully transported ... |
|
| Photonic Analog-to-Digital Conversion Using a Robust Symmetrical Number System |
JUN 2005 |
75 pages |
| Authors:
Adam S. Fisher; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| A photonic analog-to-digital converter (ADC) based on a robust symmetrical number system (RSNS) was constructed and tested. The analog signal to be converted is used to amplitude modulate an optical pulse from a laser using three Mach-Zehnder interferometers (MZI). The Mach-Zehnder interferometers fold the input analog signal for a three-channel RSNS encoding. The folding waveforms are then detected and amplitude-analyzed by three separate comparator banks, the outputs of which are ... |
|
| Monitoring the Response of Chemotherapy on Breast Cancer Tumors by Photon Migration Spectroscopy |
JUN 2005 |
17 pages |
| Authors:
David J. Hsiang; CALIFORNIA UNIV IRVINE
|
| Optimal management of patients with locally advanced breast cancer (LABC) remains a complex therapeutic problem. The optimal intensity and duration of the neoadjuvant chemotherapy regiment for LABC still remains controversial due to the difficulty of evaluating response to the treatment. The goal of this project is to use Photon Migration Spectroscopy (PMS) as a new modality to monitor the response of breast tumor to neoadjuvant chemotherapy. We measured 29 patients ... |
|
| Seamless Integration of Detection and Therapy for Breast Cancer Using Targeted Engineered Nanoparticles |
JUN 2005 |
18 pages |
| Authors:
Naomi J. Halas; RICE UNIV HOUSTON TX
|
| This report provides a summary of the progress established by our multidisciplinary, highly synergistic team of researchers from M.D. Anderson Cancer Center and Rice University on their continuous effort of exploring and development of nanoparticle-based methods to breast cancer detection, imaging, and therapy. During the first two years of this project, the team has demonstrated in a series of controlled experiments that the intense local heating induced by infrared illumination ... |
|
| Elastic Scattering Spectroscopy for the Detection of Pre-Cancer and Early Breast Cancer |
JUN 2005 |
30 pages |
| Authors:
Stephen Bown; UNIVERSITY COLL LONDON (UNITED KINGDOM)
|
| Breast cancer remains the most common malignancy affecting women within the western world, and until recently accounted for the highest number of cancer deaths in women. Epidemiological data shows an ongoing rise in the incidence within the western world, though within recent years there have been modest improvements in mortality. |
|
| Testing of Mylar Tear-Off Windshield Film for Aircraft |
31 MAY 2005 |
19 pages |
| Authors:
Nathaniel E. Bordick; Mark E. Robeson; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND FORT EUSTIS VA AVIATION APPLIED TECH DIRECTORATE
|
| In an effort to combat windscreen erosion on Army aircraft, a Mylar film has been developed to apply directly to the environmentally exposed surface of windscreens. This film can be applied to aircraft windscreens in single or multiple layer sheets, which once removed will leave no permanent residue on the underlying surface. A qualitative evaluation of Mylar Tear-Off Windshield Film (MTOWF) has been conducted, and indicates that MTOWF is appropriate ... |
|
| Investigations of Optical Limiting Involving Light-Matter Interactions |
27 MAY 2005 |
26 pages |
| Authors:
M. J. Potasek; CITY COLL NEW YORK DEPT OF PHYSICS
|
| An optical limiter keeps the power, intensity, energy or energy density transmitted by an optical system below a predetermined maximum value that is independent of the size of the input pulse while maintaining a high transmittance at low input power. The many applications of the device include laser power regulation, laser mode-locking, optical pulse shaping, signal level processing, and sensor/detector protection. Important applications include protection of sensors, such as human ... |
|
| Regional Variability and Predictability in the Upper Ocean |
23 MAY 2005 |
|
| Authors:
Robert A. Weller; Joseph H. LaCasce; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF PHYSICAL OCEANOGRAPHY
|
 | We pursued understanding of regional upper ocean and lower atmospheric variability in large part by participation in fleet exercises and examination of the realism of oceanographic and meteorological models. The exercises were MIREM (Mine Warfare Readiness Effectiveness Measuring) Programs focusing on the performance of Navy systems in the upper ocean and/or atmospheric boundary layer in the littoral environment. We conducted enhanced environmental monitoring, placing small, non-intrusive instruments on ships operating ... |
|
| Chalk-Ex: Transport of Optically Active Particles from the Surface Mixed Layer |
02 MAY 2005 |
|
| Authors:
Albert J. Plueddemann; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| Manipulative field experiments were performed in which optically-active CaCO3 coccoliths (from Cretaceous chalk) were injected into the mixed layer to create a "chalk patch". Experiments were performed at two stations, one mesotrophic and one eutrophic, during two times of the year, June and November. The scientific rationale for this experiment was that by seeding a patch, the particle production term was known absolutely, so that effort could be focused on ... |
|
| Real-Time Dosimetry and Optimization of Prostate Photodynamic Therapy |
MAY 2005 |
81 pages |
| Authors:
Timothy C. Zhu; PENNSYLVANIA UNIV PHILADELPHIA
|
| For the second year of this 3-year grant. We have completed specific aim 2 of the project, i.e., light dose calculation and optimization, and characterization of photosensitizer drug concentration. We have improved the motorized probe and associate software to measure the distribution of optical properties, drug concentration, and StO2 interstitially. We have developed a fluorescence technique to measure in-vivo phototosensitizer distribution interstitially in 5 patients and have verified its accuracy ... |
|
| Optical Coherence Tomography of the Breast: A Feasibility Study |
MAY 2005 |
11 pages |
| Authors:
James L. Connolly; BETH ISRAEL DEACONESS MEDICAL CENTER BOSTON MA
|
| Optical Coherence Tomography (OCT) is an emerging high-resolution imaging technology that can perform high resolution, real-time cross-sectional imaging of tissue. OCT can be used as a type of "optical biopsy to perform minimally-invasive imaging up to a depth of 2-3 mm with transverse resolutions as high as 10 um in commercially available systems. OCT uses near-infrared light which can be used in fiber optic devices such as catheter probes and ... |
|
| Fabrication of Organic Radar Absorbing Materials: A Report on the TIF Project |
MAY 2005 |
|
| Authors:
Paul Saville; Trisha Huber; Darren Makeiff; DEFENCE RESEARCH AND DEVELOPMENT ATLANTIC DARTMOUTH (CANADA)
|
| The fabrication of microwave absorbing materials requires the ability to make materials with well-controlled properties such as shape, thickness, permittivity and permeability. The ability to measure the permittivity and permeability is an essential requirement for designing an optimised absorber. And good optimisations codes are required in order to achieve the best possible absorber designs. In this report, the results from a Technology Investment Funded project on the fabrication of organic ... |
|
| Adaptive Laser Beam Control Using Return Photon Statistics |
MAY 2005 |
4 pages |
| Authors:
Susan M. Chandler; NUKOVE SCIENTIFIC CONSULTING LLC RANCHOS DE TAOS NM
|
| This Status Report, satisfying CLIN 000 1AB for the referenced contract, highlights the progress the Nukove Team has made during the second quarter of the Year One effort (1 March 2005-30 May 2005). Susan Chandler has had discussions with Mew Mexico State University, and Gordon Lukesh has talked extensively with NMSU statistician Deva Borah. Susan Chandler has had numerous discussions with Woof Consulting, solving the thorny issue of data sharing. ... |
|
| A Monte Carlo Radiation Model for Simulating Rarefied Multiphase Plume Flows |
MAY 2005 |
|
| Authors:
Jonathan Burt; Iain Boyd; AIR FORCE RESEARCH LAB EDWARDS AFB CA
|
| A Monte Carlo ray trace radiation model is presented for the determination of radiative properties of Al2O3 particles in the high altitude plume of a solid propellant rocket. A polydisperse distribution of non-gray particles is modeled as an emitting, absorbing and scattering medium of arbitrary optical thickness. Strong two-way coupling is allowed between radiation and flowfield calculations, where the gas is simulated using the direct simulation Monte Carlo method and ... |
|
| The Far-Infrared Emission Line and Continuum Spectrum of the Seyfert Galaxy NGC 1068 |
10 APR 2005 |
15 pages |
| Authors:
Luigi Spinoglio; Matthew A. Malkan; Howard A. Smith; Eduardo Gonzalez-Alfonso; Jacqueline Fischer; NAVAL RESEARCH LAB WASHINGTON DC
|
| We report on the analysis of the first complete far-infrared spectrum (43 197 m) of the Seyfert 2 galaxy NGC 1068 as observed with the > Long Wavelength Spectrometer (LWS) on board the Infrared Space Observatory (ISO). In addition to the seven expected ionic fine-structure emission lines, the OH rotational lines at 79, 119, and 163 m were all detected in emission, which is unique among galaxies with full LWS ... |
|
| New Frontiers in NanoBiotechnology: Monitoring the Protein Function With Single Protein Resolution |
29 MAR 2005 |
13 pages |
| Authors:
SCUOLA NORMALE SUPERIORE PISA (ITALY)
|
| This report includes abstracts of papers presented at the ICTP-INFM Conference in Trieste, Italy entitled "New Frontiers in Nanobiotechnology: Monitoring the protein function with single protein solution". Topics are on the following: protein trafficking, confocal imaging, functionalized atomic force microscopy, optimized optical markers, nonbiotechnology tools, computational methods and application, modelling methods, molecular recognition and docking, fluorescent resonant energy transfer, and other topics of interest. |
|
| Investigation of Semiconductor Nitride Deposition & Characterization on Defect-Void GaN Templates & ZnO Substrates |
11 MAR 2005 |
14 pages |
| Authors:
Hadis Morkoc; VIRGINIA COMMONWEALTH UNIV RICHMOND SCHOOL OF ENGINEERING
|
| A variety of approaches have been taken to enhance GaN quality during epitaxy and lead zirconate titanate (PZT) structures for sensors and data storage. GaN regrown on KOH etched templates with defective material removed has shown improved optical quality and demonstrated lateral growth by MBE. The same also carried out using MOCVD. GaN layers were also grown on closely lattice and stacking matched ZnO substrates. In this vein, we developed ... |
|
| Deep Level Defects in Electron-Irradiated Aluminum Gallium Nitride Grown by Molecular Beam Epitaxy |
MAR 2005 |
204 pages |
| Authors:
Michael R. Hogsed; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Aluminum gallium nitride (AlGaN)-based devices are attractive candidates for integration into future Air Force communication and sensor platforms, including those that must operate in harsh radiation environments. In this study, the electrical and optical properties of 1.0 MeV electron irradiated n-AlxGa1-xN are characterized for aluminum mole fraction x = 0.0 to 0.3 using deep level transient spectroscopy (DLTS), temperature-dependent Hall, and cathodoluminescence (CL) measurements. Following irradiation of the AlGaN, it ... |
|
| Aerosol Scattering Phase Function Retrieval From Polar Orbiting Satellites |
MAR 2005 |
97 pages |
| Authors:
Daniel P. Wunder; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF METEOROLOGY
|
| The retrieval of an aerosol scattering phase function using a multi- satellite technique is proposed. A total of 33 phase functions were derived from 18 smoke cases and 15 dust cases. Each case was interrogated using four to nine satellite passes over the aerosol in a two to four hour time frame. The radiance values for the Red and Near-Infrared (NIR) channels were combined with backscattering angles to determine the ... |
|
| Real Time Monitoring of Signaling Pathways in Biological Cells |
14 FEB 2005 |
13 pages |
| Authors:
Louise J. Brogan; Brian D. Cohen; EVIDENT TECHNOLOGIES TROY NY
|
| The goal of this research project was to determine the efficacy of EviTags as in situ nanoprobes. The experimental design used a fluorescence resonance energy transfer (FRET)-based approach to show how EviTags can monitor real-time cellular events, in particular, cell surface receptor trafficking and mRNA stability. EviTags were hypothesized to be excellent FRET donors when paired with organic dyes as acceptors because of their unique optical properties. The broad absorption ... |
|
| Cruise Report: DOLCE VITA 1 and 2, 31 January-24 February and 26 May-15 June, 2003 |
FEB 2005 |
320 pages |
| Authors:
Craig Lee; Jason Gobat; Burton Jones; Pierre- Marie Poulain; Hartmut Peters; Donald Johnson; Alessandra Campanelli; Damic Vilicic; Clive Dorman; Dietmar Thaler; Zhihong Zheng; Laura Ursella; Elena Mauri; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| As part of the U.S. Office of Naval Research sponsored DOLCE VITA (dynamics of Localized Currents and Eddy Variability in the Adriatic) program, a team of U.S., Italian, Croatian and Austrian investigators conducted two research cruises in the Northern Adriatic Sea designed to investigate mesoscale and submesoscale response to intense, small-scale Bora wind forcing and buoyant riverine discharge. A winter cruise (February 2003, R/V Knorr 172-03) observed the response of ... |
|
| Silicon-Based Visible/Near-Infrared Affordable Missile Warning |
01 JAN 2005 |
14 pages |
| Authors:
John Lowrance; Richard Miles; PRINCETON SCIENTIFIC INSTRUMENTS INC NJ
|
| The concept of the refluorescent atomic filter is shown in figure 2. Only photons at the resonant frequency of the atomic transition line are absorbed; all other photons pass through the cell without interference. If the atomic vapor is optically thick on the resonance absorption line, then photons absorbed by the atoms are trapped within the optical depth the entrance window of the cell. This trapping occurs at the same ... |
|
| Optical Lattice Laser |
01-Jan-2005 |
|
| Authors:
Jingbiao Chen; Xuzong Chen; PEKING UNIV BEIJING (CHINA)
|
| Atoms with narrow-linewidth transition trapped within the Lamb-Dick regime of optical lattice are proposed be used as laser gain medium to build a laser. The gain medium atoms can be the alkaline-earth species, Magnesium, Calcium, and Strontium, including Ytterbium. These atoms possess promising super-narrow optical clock transitions, but here, this clock transition is proposed to be used as the lasing transition of the output laser. This optical lattice laser with ... |
|
| Application of an hp-Adaptive FE Method for Computing Electromagnetic Scattering in the Frequency Domain |
01 JAN 2005 |
|
| Authors:
N. Sehlstedt; A. Zdunek; W. Rachowicz; SWEDISH DEFENCE RESEARCH AGENCY STOCKHOLM
|
| Herein the electromagnetic scattering is determined using the Finite Element Method. In particular the radar cross section of the scatterer is estimated. Comparison between the Finite Element Method (FEM), Method of Moments (MoM) and the method of Physical Optics (PO) is made in one numerical example. In another numerical example, the convergence rate is compared using pure h-refinement, p-enrichment and with a priori hp-adaptive refinements. The gain using the hp-adaptive ... |
|
| Water-Leaving Radiance of Deep and Shallow Wind-Roughened Water Body Illuminated by Sun and Sky |
2005 |
8 pages |
| Authors:
Vladimir I. Haltrin; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| This paper is devoted to derive remote sensing coefficient (RSC) or radiance reflection coefficient is a principal product of atmospheric correction algorithms applied to the remotely measured optical images of the ocean. The RSC contains information about angular structure of light radiance roughness of the ocean surface, and optical properties of the water. This presentation analyses RSC and presents it as a product of three physically different values or coefficients. ... |
|
| Optimal Sensing/Actuation Strategies for Vibration and Acoustic Control of Optical Systems |
2005 |
13 pages |
| Authors:
Suk-Min Moon; Leslie P. Fowler; Robert L. Clark; DUKE UNIV DURHAM NC DEPT OF MECHANICAL ENGINEERING AND MATERIALS SCIENCE
|
| Optical jitter can result in the beam pointing inaccuracy and poor optical system performance. With a correlated measurement of the disturbance, improved control performance can be achieved. In this research, an adaptive optimal sensing strategy for optical systems is proposed. When an array of reference sensors is available, an optimal set of reference sensors that are coupled to modes of interests can be selected. The weighted reference signal from the ... |
|
| A Comparative Study of RCS Computation Codes |
2005 |
5 pages |
| Authors:
Chia T. Tong; Ang T. Wah; Lim K. Hwee; Ou S. Philip; Yar K. Heng; David Rowse; Matthew Amos; Alan Keen; Neil Pegg; Andrew Thain; DSO NATIONAL LABORATORIES SINGAPORE
|
| This paper reports the results of an ongoing study between BAE Systems, U.K., and DSO National Laboratories, Singapore, into the accuracy, performance and capabilities of computational electromagnetics (CEM) codes. For the purpose of this paper, we will report two of the selected test cases, a re-sized NASA almond, a generic missile and the COBRA inlet. The first test object is a (fictitious) generic missile. It provides a test problem for ... |
|
| Horizontal Irradiance Model for Self-Consistent Radiative Transfer Approach in Natural Water With Arbitrary Values of Inherent Optical Properties |
2005 |
7 pages |
| Authors:
Vladimir I. Haltrin; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The purpose of this paper is to obtain the simplest analytic solution to the radiative transfer problem in a shallow water with wavy surface and reflecting bottom that takes into account all orders of scattering inside water as well as all orders of scattering (or reflection) from bottom and sea surface. The approach used here is a self-consistent approach (SCA) [1-3] that was originally devised to obtain upward and downward ... |
|
| > 360W and > 70% Efficient GaAs-Based Diode Lasers |
2005 |
10 pages |
| Authors:
Paul Cramp; Jun Wang; Suhit Das; Mike Grimshaw; Jason Farmer; Mark DeVito; Weimin Dong; Trevor Crum; Damian Wise; Yan Feng; NLIGHT PHOTONICS CORP VANCOUVER WA
|
| High power GaAs-based high power diode bars produce wavelengths in the range of 780 to 980 nm and are widely used for pumping a broad range of rare earth doped solid-state lasers. As the markets for these laser systems mature, diode lasers that operate at higher power levels, greater overall efficiency, and higher reliability are in high demand. In this paper we report efficiencies of over 70% in the 9xx-nm ... |
|
Reports by Keyword(s)
OPTICAL PROPERTIES
