| Negative Refraction in the Optical Range and Left-Handed Photonics |
19-Jul-2009 |
11 pages |
| Authors:
Vladimir M Shalaev; PURDUE UNIV LAFAYETTE IN
|
 | In this project, we were concerned primarily with studying the physical phenomena, devices and designs related to negative refraction in the optical frequency range. We used theoretical work, computer simulations, and experimental studies to further the understanding of negative refraction in the high sought-after optical range. Our work has brought a number of significant advances, including experimental demonstrations of negative refraction well into the visible range to advanced designs in ... |
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| Progress on a Portable Rubidium Fountain Frequency Standard |
01-Dec-2008 |
9 pages |
| Authors:
S R Jefferts; T P Heavner; P D Kunz; NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO TIME AND FREQUENCY DIV
|
| We are developing a simple and transportable laser-cooled rubidium (Rb) atomic fountain frequency standard. The optical package for this system uses DFB (distributed feedback) diode lasers and a frequency offset locking scheme to generate the optical frequencies needed for laser-cooling, launching, post-cooling, and detection of Rb atoms. This atomic fountain will be useful as a transfer standard and secondary standard for calibrating nontransportable frequency standards, as well as a measurement ... |
|
| Imaging the Spatial Distribution of Transport Currents and the Phenomenon of Nanoscale Phase Separation Phenomenon in CMR Materials |
13 SEP 2007 |
5 pages |
| Authors:
Satyajit Banerjee; INDIAN INST OF TECH KANPUR DEPT OF PHYSICS
|
| The aim of the proposal was to develop a magneto-optics imaging "MOI" set up which will enable the direct imaging of transport current distribution inside a variety of materials. The primary objective of the proposal was to enhance the sensitivity of the existing magneto-optical imaging setup developed in the PI's laboratory to optically image the self fields generated by transport currents sent through materials. Based on the above objective it ... |
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| Spin Coherence in Semiconductor Nanostructures |
10 DEC 2006 |
22 pages |
| Authors:
Michael E. Flatte; IOWA UNIV IOWA CITY
|
| We report progress in calculations of spin coherence and spin transport properties in nanoscale geometries, including calculations of g-factors in quantum dots, exchange interactions in Si/Ge quantum dots, tuning of spin coherence times for electron spin, tuning of dipolar magnetic fields for nuclear spin, spontaneous spin polarization generation and new designs for spin-based teleportation and spin transistors. Our new proposal for electron-spin based teleportation is mediated by single photons and ... |
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| Spectroscopy of Metamaterials from Infrared to Optical Frequencies |
01-Mar-2006 |
12 pages |
| Authors:
LOS ALAMOS NATIONAL LAB NM MATERIALS SCIENCE AND TECHNOLOGY DIV
|
| We review both the theoretical electromagnetic response and the spectroscopic measurements of metamaterials. To critically examine published results for metamaterial structures operating in the range from terahertz to optical frequencies, we focus on protocols allowing one to extract the optical constants from experimental observables. We discuss the complexity of this task when applied to metamaterials exhibiting electric, magnetic, and magneto-optical response. The general theory of the electromagnetic response of such ... |
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| Magnetization Reversal in an Fe Film with an Array of Elliptical Holes on a Square Lattice |
2006 |
9 pages |
| Authors:
I. Guedes; M. Grimsditch; V. Metlushko; P. Vavassori; R. Camley; B. Ilic; P. Neuzil; R. Kumar; COLORADO UNIV AT COLORADO SPRINGS
|
| The reversal mechanism for the magnetization in an Fe film with an array of elliptical holes is investigated using the diffracted magneto-optic Kerr effect (D-MOKE) technique. D-MOKE results are obtained as a function of temperature and the angle between the applied magnetic field and an ellipse axis. The transverse and longitudinal magnetization components and minor magnetization loops are also explored in order to understand the reversal process. The experimental results ... |
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| Microscopic Analysis of Spin Coherences in Semiconductor Nanostructures |
16 DEC 2004 |
4 pages |
| Authors:
K. B. Whaley; CALIFORNIA UNIV BERKELEY SPONSORED PROJECTS OFFICE
|
| The authors have developed microscopic theory for analysis of spin excitations in semiconductor nanocrystals and endohedral fullerenes based on atomistic electronic structure calculations. They have made calculations of shape and size dependence of electronic and excitonic g-factors; examined magnetic properties of Mn:ZnS dilute magnetic semiconductor nanocrystals; made atomistic calculation of coherent spin transfer between nanocrystals linked by organic molecules; calculated structural, magnetic, and transport properties of a high-spin endohedral metallofullerene ... |
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| Atom Manipulation Using Optical Fields |
15 SEP 2004 |
7 pages |
| Authors:
Paul R. Berman; Tycho Sletor; MICHIGAN UNIV REGENTS ANN ARBOR DIV OFRESEARCH DEVELOPMENT AND ADMINISTRATION
|
| The long range goal of this project was the creation of nanostructures using light fields to manipulate atoms. By passing an atomic beam through one or more standing wave light fields, it is possible to create modulations in the atomic density having periods which are a fraction of the period of the standing wave light fields. Patterns having periods as small as lambda/10 were observed using optical masks and clear ... |
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| High Sensitivity Magnetometers. Sensors and Applications |
NOV 2002 |
63 pages |
| Authors:
CAEN UNIV (FRANCE) DEPT SCIENCES POUR L'INGENIEUR
|
| The Final Proceedings for High Sensitivity Magnetometers Sensors and Applications: 4 - 8 November 2002. Magnetic sensors designed to operate both at room temperature and at cryogenic temperatures. Applications of these sensors will also be addressed including non-destructive evaluation of composite materials, magnetic anomaly detection, space magnetism, and geomagnetism. |
|
| Compact, Continuous-Beam, Cold-Atom Clock for Satellite Applications |
30 JUN 2002 |
17 pages |
| Authors:
H. Wang; W. R. Buell; AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
|
| Highly stable atomic frequency standards are of increasing importance for a variety of space applications, ranging from communication to navigation and time transfer to tests of fundamental science. The requirements for an atomic clock vary significantly depending on the application, and for many space systems, compactness and robust design are at a premium, and stability dominates over absolute accuracy. We report on progress with our design for a compact laser-cooled ... |
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| Spectroscopy of Rydberg Atoms in Non-Neutral Cold Plasmas |
24 JUN 2002 |
7 pages |
| Authors:
D. Feldbaum; N. V. Morrow; S. K. Dutta; G. Raithel; MICHIGAN UNIV ANN ARBOR DEPT OF PHYSICS
|
| The electric field in mm-sized one-component non-neutral plasmas is measured using the Stark effect of Rydberg atoms embedded in them. The plasmas are clouds of cold Rb(+)-ions, which are produced by UV photoionization of laser-cooled Rb atoms in a magneto-optic trap. The dependence of the electric field on the number of ions and the Coulomb explosion of the ion clouds have been studied. |
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| New Integrated Optical Components for Broadband Communication Systems |
APR 2002 |
8 pages |
| Authors:
Anand Gopinath; Richard Osgood; MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The objectives of this project was to design and fabricate polarization insensitive semiconductor optical amplifiers, design and fabricate planar optical isolators, investigate the possibility of their integration. Quantum well polarization insensitive semiconductor optical amplifiers in GaInAsP and AlInGaAs at 1300 nm, and the latter at 1550 nm were designed and tested, at Minnesota. Planar isolators in the Mach-Zehnder configuration were designed and tested at Columbia. The integration issues were investigated ... |
|
| Near-Field Photoluminescence Spectroscopy of Localized States in InGaAsN Alloys |
JAN 2002 |
6 pages |
| Authors:
A. M. Mintairov; P. A. Blagnov; T. Kosel; J. L. Merz; V. M. Ustinov; NOTRE DAME UNIV IN DEPT OF ELECTRICAL ENGINEERING
|
| We used near-field magneto-photoluminescence scanning microscopy to study structural and optical properties of quantum-dot-like compositional fluctuations in GaAsN and InGaAsN alloys. We show that these fluctuations manifest themselves by the appearance of narrow emission lines (half width 0.5-2 meV) at temperatures below 70 K. We estimated the size, density, and nitrogen excess of individual compositional fluctuations (clusters), revealing phase-separation effects in the distribution of nitrogen in GaAsN and InGaAsN. We ... |
|
| Optically Detected Magnetic Resonance Study of Core-Shell and Alloy Nanocrystals of HgTe and CdS |
JAN 2002 |
6 pages |
| Authors:
L. Fradkin; L. Langof; E. Lifshitz; A. Rogach; N. Gaponik; TECHNION - ISRAEL INST OF TECH HAIFA
|
| The synthesis of HgTe nanocrystals (NCs), coated with a CdS shell, presumably results in the formation of HgTe/CdS, HgTe/CdHgS core-shell structures or separated CdHgS alloys. Photoluminescence (PL), continuous-wave (cw) and time-resolved optically detected magnetic resonance (ODMR) spectroscopy examined the magneto-optical properties of the dominating resonance aforementioned products. The cw ODMR measurements indicated that the NCs exhibit a band, centered at 0.39 Tesla, corresponding to an excited state electron (e) and ... |
|
| Mid-Infrared Induced Energy Transfers in Si:Er |
16 OCT 2001 |
10 pages |
| Authors:
Tom Gregorkiewicz; AMSTERDAM UNIV (NETHERLANDS)
|
| Excitation and de-excitation mechanisms responsible for photoluminescence of Er(3+) ion in crystalline silicon were investigated by a variety of experimental techniques. Special emphasis was on the two-color time- resolved spectroscopy in the mid-infrared performed at a free-electron laser facility. Application of this technique for spectroscopic investigations of energy transfers within the Si:Er system has been originally proposed and developed in the team of the Principal Investigator. This unique experimental approach ... |
|
| Development of a Common Database for Digital Mammography Research |
OCT 2001 |
8 pages |
| Authors:
Robert M. Nishikawa; CHICAGO UNIV IL
|
| The purpose of this infrastructure project is to develop a large database of digitized mammograms that will be distributed free of charge to researchers working in all aspects of digital mammography. This database will facilitate and promote rapid development in digital mammography research. The database will consist of 1000 cases subdivided into 5 categories, 4 containing different breast lesions -- masses, microcalcifications, architectural distortions, asymmetric densities (both benign and malignant) ... |
|
| NATO ASI at Windsor on 13-26 August Programme |
26 AUG 2001 |
|
| Authors:
NATO ADVANCED STUDY INST BRUSSELS (BELGIUM)
|
|
| Magneto-Resistance and Induced Domain Structure in Tunnel Junctions |
APR 2001 |
|
| Authors:
M. Hehn; O. Lenoble; D. Lacour; A. Schuhl; C. Tiusan; LABORATOIRE DE PHYSIQUE DES MATERIAUX (UMR-CNRS) VANDOEUVRE LES NANCY (FRANCE)
|
 | Magnetization reversals in sputtered Co electrodes of a magnetic tunnel junction are studied using transport measurements, magneto-optic Kerr magnetometry and microscopy. Using the tunnel magneto-resistive effect as a probe for micromagnetic studies, we first evidence the existence of an unexpected domain structure in the soft Co layer. This domain structure originates from the duplication of the domain structure of the hard Co layer template into the soft layer via ferromagnetic ... |
|
| Oscillatory Angular Dependence of Exchange Bias for Epitaxial NiO-Co (001) Bilayers |
APR 2001 |
|
| Authors:
S. Dubourg; J. F. Bobo; B. Warot; E. Snoeck; J. C. Ousset; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE TOULOUSE (FRANCE)
|
| We have sputter-deposited NiO-Co bilayers on MgO (001) substrates. NiO grows epitaxially on MgO at 900 deg C and subsequently the room deposited 80 A thick Co films have a fcc crystal structure in epitaxy with the oxide underlayer. These samples were warmed up to 300 deg C and then zero-field or field cooled through the NiO Neel temperature (a 300 Oe magnetic field was applied along the 100 or ... |
|
| Exchange-Biased NiO-Co Nanofaceted Bilayers Grown on MgO (110) |
APR 2001 |
|
| Authors:
S. Dubourg; J. F. Bobo; B. Warot; E. Snoeck; J. C. Ousset; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE TOULOUSE (FRANCE)
|
| We have sputter-grown self-organised faceted NiO-Co epitaxial bilayers on MgO(110). Due to very close lattice parameters, NiO adopts the same NaCl crystallographic structure as the substrate but it minimises its surface energy growing in a stripe-shaped morphology elongated along 001 MgO direction. The Co layers then deposited on NiO adopt a fcc structure. They consist of a set of connected nanowires whose height is about 50 A, length is near ... |
|
| Fundamental Studies for High Temperature Superconductor Conductor Technology |
17 OCT 2000 |
7 pages |
| Authors:
David C. Larbalestier; WISCONSIN UNIV-MADISON APPLIED SUPERCONDUCTIVITY CENTER
|
| Research on state-of-the-art conductor forms of Coated Conductors made from the superconducting material, YBa2Cu3O(x), has been performed. The principal results obtained are: (1) Misoriented substrate grains control the critical current performance of today's good conductor prototypes; (2) Magneto- optical imaging is a good means of studying the current flow barriers in such conductors; (3) Low angle grain boundary properties are of great importance to ... |
|
| Epitaxial Growth and Characterization of MnAs/Si(111) Nanoscale Magnetoelectronic Heterostructures |
23 JUN 2000 |
4 pages |
| Authors:
A. G. Banshchikov; R. V. Pisarev; A. A. Rzhevsky; N. S. Sokolov; Ahsan M. Nazmul; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| Molecular beam epitaxy was used to grow thin (6-12 nm) ferromagnetic MnAs films on a Si(111) substrate. The characterization of the film structural and magnetic properties was carried out using X-ray. RHEED. AFM and magneto-optical methods. |
|
| Size and Shape Effects in Shrinking Submicron Magnetic Memory and Logic |
30 NOV 1999 |
12 pages |
| Authors:
Brian W. Robertson; Peter A. Dowben; NEBRASKA UNIV LINCOLN
|
| The research is based on radiation-induced selective area fabrication (using metallocenes) of large arrays of micrometer sub-micrometer scale ferromagnetic features and on magnetic characterization as a function of size and shape. With 100 keV electrons we fabricated highly uniform 8nm features. With light we fabricated many sizes and shapes of identical micrometer-scale magnetic features (Ni, Fe, Co, CrO2, and Co/Pd multilayers) in large arrays, quickly, ... |
|
| International Conference "Advanced Materials Symposium A: Engineering ofComposites: Investigation, Technologies, and Perspectives. Abstracts |
08 OCT 1999 |
373 pages |
| Authors:
UKRAINIAN ACADEMY OF SCIENCES KIEV INST OF MATERIALS SCIENCE PROBLEMS
|
| The Final Proceedings for International Conference, 3 October 1999 - 7 October 1999. This is an interdisciplinary conference. Topics include: Mathematical and Computer Simulation, Interface Interaction, Adhesion and Interconnection, Behavior under Mechanical Loading, Composites with the Ceramic Matrix, Composites with the Metallic Matrix, Composites with the Carbon Matrix, Composites with the Polymer Matrix, Powder Metallurgy, (10) Functionally Graded Materials, Nanocomposites, Smart Composites Testing, Industrial ... |
|
| Development of a Common Database for Digital Mammography Research |
OCT 1999 |
9 pages |
| Authors:
Robert M. Nishikawa; CHICAGO UNIV IL
|
| The purpose of this infrastructure project is to develop a large database of digitized mammograms that will be distributed free of charge to researchers working in all aspects of digital mammography. This database will facilitate and promote rapid development in digital mammography research. The database will consist of 1000 cases subdivided into 5 categories, 4 containing different breast lesions -- masses, microcalcifications, architectural distortions, asymmetric densities (both benign and malignant) ... |
|
| Evaluation of NDT Technologies in Support of CP 140 Aircraft Sampling Inspection |
OCT 1999 |
|
| Authors:
J. S. Giguere; DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNSVIEW (ONTARIO)
|
| This evaluation was undertaken to identify possible nondestructive inspection systems that will fulfill the requirements of the CP140 Aircraft Structural Integrity Programme (ASIP). The CP140 aircraft is fast approaching its originally intended life expectancy and staff from the Directorate of Technical Airworthiness and the CP140 Aircraft Engineering Office are considering an extension. In that light, the third line support contractor (i.e. , Industrial Maritime ... |
|
| Atom Imaging |
23 JUL 1999 |
10 pages |
| Authors:
J. E. Thomas; DUKE UNIV DURHAM NC DEPT OF PHYSICS
|
| Three major results of this program are described: (1) Raman-induced resonance imaging is used to measure the distribution of atoms in a magneto- optical trap; (2) Nonoptical sources of heating in atom traps are explored theoretically. including laser-noise induced heating in optical traps and quantum-diffractive background gas collision-induced heating in shallow magnetic or optical traps; (3) An ultrastable CO2 laser trap is demonstrated that achieves ... |
|
| Band Parameters of MQWs Heterostructures InGaAs/GaAs: Magnetooptical Study |
18 JUN 1999 |
4 pages |
| Authors:
K. Moumanis; R. P. Seisyan; S. I. Kokhanovskii; M. E. Sasin; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| Investigation of the optical absorption and magnetoabsorption spectra of a set of In(x)Ga(1-x)As/GaAs strained MQWs with different well widths and different Indium content x has been carried out at I .7 K in the presence of the magnetic field up to 7.5 T. The measurements performed on the free standing samples have allowed to obtain well-resolved oscillatory spectra and to reconstruct Landau level positions. An effective mass of the electron ... |
|
| Magnetooptics of the Excitonic States in the Shallow GaAs/AlGaAs Quantum Wells |
18 JUN 1999 |
4 pages |
| Authors:
N. N. Sibeldin; M. L. Skorikov; V. A. Ysvetkov; B. Etienne; RUSSIAN ACADEMY OF SCIENCES MOSCOW LEBEDEV SOLID STATE PHYSICS DIV
|
| Photoluminescence (PL) and photoluminescence excitation (PLE) spectra of asymmetric two-well GaAs/Al(0.05)Ga(0.95)As structures with tunnel-isolated shallow quantum wells. In magnetic field oriented both perpendicular and parallel to the layers were studied at liquid helium temperatures. In the PLE spectra we observed tbe lines which most probably correspond to absorption by excitons formed by a QW localized carrier and a free carrier of opposite sign attracted by the Coulomb force. Clear indication ... |
|
| Combined Magnetopolaron in Magnetooptical Effects in Quantum Wells |
18 JUN 1999 |
4 pages |
| Authors:
I. Korovin; I. G. Lang; S. T. Palov; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| Combined polaron states in a rectangular quantum well in a strong magnetic field directed perpendicular to the QW plane have been considered. At low temperatures these states are due to interaction of two electron energy levels (with different Landau quantum numbers (n and n(1)) and different size-quantization quantum numbers (m and m(1)) with confined LO phonons under condition when the energy difference of the electron levels is close to the ... |
|
| Second Harmonic Generation Probing of MnAs/Si(111) Heterostructures |
18 JUN 1999 |
4 pages |
| Authors:
A. G. Banshchikov; A. V. Kimel; V. V. Pavlor; R. V. Pisarev; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| Ferromgnetic semiconductor heterostructures MnAs/Si(111) have been studied by using the optical second harmonic generation and the linear magneto-optical Kerr effect. Magnetic and crystallographic contributions to the SHG are separated on the base of rotational anisotropy method. Magnetic hysteresis loops measured by the SHG and the Kerr effect exhibit different behavior due to a different sensitivity Of two optical techniques to the interface surface and bulk properties. |
|
| Journal of Magnetism and Magnetic Materials. Volumes 198-199, 1 June 1999 |
01 JUN 1999 |
795 pages |
| Authors:
A. J. Freeman; NORTHWESTERN UNIV EVANSTON IL DEPT OF PHYSICS AND ASTRONOMY
|
| The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials and magnetic recording. The journal encourages greater interaction between the basic and applied subdisciplines of magnetism, with short but comprehensive review articles, a rapid publication channel with Letters to the Editors, and a section ... |
|
| RD-681/UHN and RD-674A/UHN Recorder Reproducers |
22 APR 1999 |
5 pages |
| Authors:
Matthew T. Durkin; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| The RD-674A/UHN and RD-681/UHN Recorder Reproducers are Commercial off the Shelf (COTS) equipments that have been mechanically modified to allow the equipment to pass MIL-S-901D shock tests. All components in the recorders are readily available on the commercial market. The recorders contain a 586 microprocessor that operates at 133 MHz. They also contain 16 bit A/D and D/A converters for signal sampling and reproduction. Both of these components are found ... |
|
| Dipole-Dipole Interactions in a Frozen Rydberg Gas |
MAY 1998 |
142 pages |
| Authors:
John R. Lowell; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF PHYSICS
|
| We investigate here the characteristics of energy resonant dipole- dipole interactions between Rydberg atoms in Magneto-Optical Trap. These resonant processes occur in a kinetic energy regime in which the atoms may be considered stationary over the time scale of the experiment. Coupled with the long range of the interactions considered, this leads to multi-atom interactions becoming non-negligible. A simple model is outlined to provide insight into the effects of these ... |
|
| High Capacity Optical Jukebox |
APR 1998 |
27 pages |
| Authors:
Dan Matukewicz; Chris Williams; EASTMAN KODAK CO ROCHESTER NY
|
| Air Force Research Laboratory, Information Directorate has been performing research and development in the area of large capacity optical disk storage technology for several years. One area of particular interest is the development of an erasable, large-format (14 inch diameter) optical disk media and a suitable, high-performance optical recording head. A large-format disk provides for extremely large storage capacity in excess of 10 gigabytes with future expansion to 25 gigabytes. ... |
|
| Detection of Corrosion Under Paint Using Magneto-Optic Imaging |
19 FEB 1998 |
|
| Authors:
Gerald Fitzpatrick; Richard Skaugset; PHYSICAL RESEARCH INC KIRKLAND WA
|
| This report describes developments in magneto-Optic imaging that make possible practical real-time imaging of surface corrosion under protective coatings in both steel and aluminum. The technology can also be applied to the detection of cracks. To accomplish imaging in steel a new method for producing rotating in-plane magnetization in steel parts was developed and combined with real-time magneto-optic imaging. Imaging in aluminum is accomplished by using an eddy-current excitation device ... |
|
| (DURIP-96) Development of a Spato-Temporal Spin Resonance NSOM for Studies of Magnetic Nanostructures |
JUL 97 |
4 pages |
| Authors:
Awschalom; CALIFORNIA UNIV SANTA BARBARA
|
| The low temperature near field scanning optical microscope was designed and constructed in the physics department at UCSB, and the associated optical equipment was purchased and successfully integrated. The resulting piece of equipment is one of the few running variable temperature magnetooptical NSOMs in the country. |
|
| Anisotropy in Epitaxial Films |
13 JUN 1997 |
7 pages |
| Authors:
C. V. Thompson; R. C. O'Handley; MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR MATERIALS SCIENCE AND ENGINEE RING
|
| Experiments on epitaxial Ni films grown on epitaxial Cu films grown on single crystal (100) Si wafers in a molecular beam epitaxy system modified to make in situ magneto-optic Kerr effect (MOKE) measurements were carried out. Ex situ transmission electron microscopy and wafer curvature measurements were made and it was shown that the onset of misfit accommodation, the decrease in Ni strain with increasing film thickness, and the increase in ... |
|
| Collisional Processes Involving Atmospheric Gases |
JUN 97 |
5 pages |
| Authors:
Chun C. Lin; WISCONSIN UNIV-MADISON DEPT OF PHYSICS
|
| This report summarizes research works on the following areas. (1) Measurements of cross sections for electron impact excitation into the metastable levels of argon and number densities of metastable argon atoms have been completed. We also measured the disappearance rates of the metastable atoms after the electron beam is turned off and the observed decay modes are consistent with diffusion loss. (2) Electron impact excitation of the vibrational levels of ... |
|
| Influence of Substrate Surface Reconstruction on the Growth and Magnetic Properties of Fe on GaAs(001) |
13 MAR 1997 |
7 pages |
| Authors:
E. M. Kneedler; B. T. Jonker; P. M. Thibado; R. J. Wagner; B. V. Shanabrook; L. J. Whitman; NAVAL RESEARCH LAB WASHINGTON DC
|
| We have studied the magnetic and structural properties of epitaxial bcc Fe(001) films grown at 175 C on molecular-beam epitaxy-prepared GaAs(001)-2*4 and -c(4*4) reconstructed surfaces, with film thicknesses ranging up to ~30 ML (~43 ). We present measurements of the thickness-dependent evolution of the magnetic properties of the Fe films as determined by in situ magneto-optic Kerr effect. We find that the magnetic properties and growth mode are similar for ... |
|
| (DURIP-95) Nano-Kelvin Cooling of Dense Atoms for an Ultra-Stable Fountain Atomic Clock |
FEB 97 |
6 pages |
| Authors:
Shaoul Ezekiel; Selim Shahriar; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
|
| With the funding provided under this grant, we have procured equipments for creating a sample of 87Rb atoms with ultracold temperature (35 nano-Kelvin) and high density (10(exp 12 /sq cm), using Raman cooling via velocity selective coherent population trapping. We have already been able to create a magneto-optic trap (MOT) of 87Rb atoms, loaded from background rubidium vapor inside the trap chamber. We have achieved a density close to 10(exp ... |
|
| (DURIP-95) Research Instrumentation for Investigations in Atomic, Molecular and Optical Physics |
NOV 96 |
5 pages |
| Authors:
Kenneth A. Hardy; FLORIDA INTERNATIONAL UNIV MIAMI DEPT OF PHYSICS
|
| A ring Ti/dye laser was purchased from Coherent Laser, model 899-21. The laser has been used in experiments involving metastable atom beam cooling. During this work the investigators developed a method of measuring laser line width that can be directly related to the fundamental quantities time and distance. Two spectra taken with the ring laser are included with this report. |
|
| Laser Optics Protective Device. |
OCT 1996 |
|
| Authors:
Brian L. Justus; Alan L. Huston; Anthony J. Campillo; Charles D. Merritt; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A broadband thermal optical limiter disposed between a laser oscillator and a laser amplifier system for protecting optical components in the laser oscillator from damage due to amplified optical feedback from the laser amplifier system at all near ultraviolet, visible and near infrared wavelengths is disclosed. The thermal optical limiter comprises: a first lens for focusing the amplified optical feedback to a focal point on an optical axis; a flowing ... |
|
| Proceedings of the Annual Conference on Magnetism and Magnetic Materials (40th), Held in Philadelphia, Pennsylvania on 6-9 November 1995. Volume 79 Number 8, Part 2B |
15 APR 96 |
|
| Authors:
AMERICAN INST OF PHYSICS NEW YORK
|
|
| Guided-Wave Optoelectronics: Device Characterization, Analysis, and Design. International Symposium Proceedings Held in Brooklyn, NY on October 26 - 28, 1994 |
24 OCT 95 |
|
| Authors:
Theodor Tamir; Giora Griffel; Henry L. Bertoni; POLYTECHNIC UNIV BROOKLYN NY
|
|
| Development of a Common Database for Digital Mammography Research |
OCT 95 |
10 pages |
| Authors:
Robert M. Nishikawa; CHICAGO UNIV IL
|
| The purpose of this infrastructure project is to develop a large database of digitized mammograms that will be distributed free of charge to researchers working in all aspects of digital mammography. This database will facilitate and promote rapid development in digital mammography research. The database will consist of 1000 cases subdivided into 5 categories, 4 containing different breast lesions -- masses, microcalcifications, architectural distortions, asymmetric densities (both benign and malignant) ... |
|
| Proceedings of Materials Research Society Symposium on Magnetic Ultrathin Films, Multilayers and Surfaces, Held in San Francisco, California on April 17-20, 1995. Volume 384 |
APR 95 |
|
| Authors:
E. E. Marinero; B. Heinrich; W. F. Egelhoff Jr.; A. Fert; H. Fujimori; MATERIALS RESEARCH SOCIETY PITTSBURGH PA
|
|
| Visualization of Circuit Card Electromagnetic Fields |
20 JAN 95 |
86 pages |
| Authors:
Daniel Zwillinger; ZWILLINGER AND ASSOCIATES NEWTON MA
|
| Circuit boards are used in nearly every electrical appliance. Most board failures cause differing currents in the circuit board traces and components. This causes the circuit board to radiate a differing electromagnetic field. Imaging this radiated field, which is equivalent to measuring the field, could be used for error detection. Using estimates of the fields radiated by a low power digital circuit board, properties of known materials, and available equipment, ... |
|
| Functional Materials. Volume 2, Number 2, 1995 |
95 |
139 pages |
| Authors:
V. P. Seminozhenko; A. V. Tolmachev; Yu. S. Kaganovskii; UKRAINIAN SSR ACADEMY OF SCIENCES KIEV
|
| This program was designed so as to combine interests of chemists and physicists and the following topics were addressed by participants: Surface modification; Applications of modified surfaces for HPLC phases, adsorbents, catalysts, sensors etc.; Surface induced properties of systems; Chemical and physical processes on surfaces; Modern methods for surface analysis and characterization; Self assembly on solid materials. The scientific program consisted of lectures and poster presentations. The CPS-94 included special ... |
|
| Development of a Transient Internal Probe Diagnostic |
16 DEC 94 |
42 pages |
| Authors:
Thomas R. Jarboe; Arthur T. Mattick; UNIV OF WASHINGTON SEATTLE AEROSPACE AND ENERGETICS RESEARCH PROGRAM
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| A research effort was carried out to develop and test key components of the transient internal probe, a diagnostic tool for measuring internal magnetic fields in a plasma. A gasdynamic sabot separation method was developed for discarding the sabot upstream of the plasma. Separation is effected in a vented 50-caliber gun barrel, and the sabot is deflected upstream of the plasma, reliably removing the sabot without disrupting the probe trajectory. ... |
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Reports by Keyword(s)
MAGNETOOPTICS
