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作者： Reuss, Robert H. Chalamala, Babu R. Moussessian, Alina Kane, Michael G. Kumar, Amrita Zhang, David C. Rogers, John A. Hatalis, Miltos Temple, Dorota Moddel, Garret Eliasson, Blake J. Estes, Michael J. Kunze, Joseph Handy, Erik S. Harmon, Eric S. Salzman, David B. Woodall, Jerry M. Alam, M. Ashraf Murthy, Jayathi Y. Jacobsen, Stephen C. Olivier, Marc Markus, David Campbell, Paul M. Snow, Eric Arlington VA 22203 United States Indocel Technologies Res. Triangle Park NC 27709-2238 United States Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109 United States Sarnoff Princeton NJ 08540 United States Acellent Technologies Inc. Sunnyvale CA 94089 United States University of Illinois Urbana IL 61801 United States Lehigh University Bethlehem PA 18015-3193 United States RTI International Res. Triangle Park NC 27709-2889 United States Phiar Corporation Boulder CO 80302 United States University of Colorado Boulder CO 80309-0425 United States Melles Griot Electro-Optics Longmont CO 80503 United States SI2 Technologies Inc. Chelmsford MA 01824 United States LightSpin Technologies Inc. Norfolk MA 02056 United States LightSpin Technologies Inc. Bethesda MD 20824-0198 United States School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907-2035 United States School of Mechanical Engineering Purdue University West Lafayette IN 47907-2088 United States Sarcos Salt Lake City UT 84108 United States Naval Research Laboratory Washington DC 20375-5000 United States Radar Technology and Hardware Implementation Group United States Department of Electrical and Computer Engineering Lehigh University Bethlehem PA United States

Flexible, large area electronics - microelectronics - using amorphous silicon, low-temperature polysilicon, or various organic and inorganic nanocrystalline semiconductor materials is beginning to show great promise. While much of the activity in macroelectronics has been display-centric, a number of applications where macroelectronics is needed to enable solutions that are otherwise not feasible are beginning to attract technical and/or commercial interest. In this paper, we discuss the application drivers and the technology needs and device performance requirements to enable high performance applications to include RF systems. © 2005 IEEE.

关键词： Microelectronics

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Targeting Magnetic Nanoparticles in High Magnetic Fields for Drug Delivery Purposes

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MRS Online Proceedings Library 2004年第1期820卷 85-90页

作者： Ramazan Asmatulu Richard.O. Claus Judy S. Riffle Michael Zalich Fiber & Electro Optics Research Center Bradley Department of Electrical and Computer Engineering Virginia Tech Blacksburg USA Department of Chemistry Virginia Tech Blacksburg USA

Biodegradable magnetic nanoparticles were synthesized using Poly(L-Lactic Acid) and magnetite nanoparticles (∼14 nm) at different dosages, and then these nanaoparticles (nanocomposites) and pure magnetic particles were targeted in external magnetic fields by changing the test parameters. The magnetic field test results showed that magnetic saturation, fluid speed, magnetic field distance and particle size were extremely effective for a magnetic guidance system that is needed for an effective drug delivery approach. Thus, it is assumed that such nanoparticles can carry drugs (chemotherapy) to be able to cure cancer tumors as well as many other diseases.

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Initialization and Convergence of the Stochastic Mixing Model

Initialization and Convergence of the Stochastic Mixing Mode...

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Imaging Spectrometry IX

作者： Eismann, Michael T. Hardie, Russell C. Sensors Directorate Air Force Research Laboratory 2241 Avionics Circle Wright-Patterson AFB OH 45433-7700 Department of Electrical Engineering Electro-Optics Program University of Dayton 300 College Park Drive Dayton OH 45469-0226

An investigation of methods for class mean and covariance initialization of a stochastic mixing model for hyperspectral imagery is described along with other relevant issues concerning algorithm convergence such as updating of the class priors, constraining the mixture classes and the number of fraction levels and endmember classes. The various refinements of the iterative algorithm are presented and tested on synthetically-generated test data as well as real reflective hyperspectral imagery, and recommendations are made concerning how the stochastic mixing model can be best implemented. The results show that the refined stochastic mixing model is a robust approach for unmixing hyperspectral imagery with different levels of complexity.

关键词： Signal processing

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Synthesis and Characterization of electrostatical Self-Assembly CdSe/Polymer Nanocomposite Films

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MRS Online Proceedings Library 2003年第1期733卷 1-6页

作者： Liangmin Zhang Fajian Zhang R. O. Claus Fiber & Electro-Optics Research Center Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg USA

Using a novel electrostatic self-assembly (ESA) method to incorporate CdSe quantum dots into polymer we have successfully synthesized ultrathin films. This method allows the molecular-level thickness control and layer-by-layer formation of multilayer thin and thick films using alternative anionic and cationic molecular solution dipping. From ellipsometric measurements, we obtained that the thickness of per bilayer is around 3.7 nm. UV-vis absorption spectra versus the number of bilayers have also been obtained using an Hitachi 2001 spectrometer. The size of CdSe quantum dots has been measured using transmission electron microscopy before the CdSe quantum dots are incorporated and confirmed using atomic force microscopy after the formation of the film, respectively. Both measurements indicate that the diameter of the CdSe quantum dots is 2-3 nm. Xray photoelectron spectroscopy indicates that the concentration of the CdSe quantum dots in the film is 2.14%.

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Analysis of metal grating diffraction by models with perfect electric conductors

Analysis of metal grating diffraction by models with perfect...

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Frontiers in optics, FiO 2003

作者： Leung, K. Ming Lin, Chung-Hsiang Tamir, Theodor Choi, Kwong-Kit Department of Computer Science Polytechnic University Six MetroTech Center BrooklynNY11201 United States Industrial Technology Research Institute Hsinchu Taiwan Department of Electrical and Computer Engineering Polytechnic University Six MetroTech Center BrooklynNY11201 United States Electro-optics and Photonics Division US Army Research Laboratory AdelphiMD20783 United States

ISBN: (纸本)1557527598

Modal field approach to the modeling of the electromagnetic properties of three-dimensional periodic structures containing metallic components often is plagued by convergence and instability problems. These problems arise due to the extremely large and negative values of the real part of the permittivities at the frequencies of interest. We show that the electromagnetic fields can be modeled accurately by treating the metal as perfect electric conductors. Our approach makes use of modified field representations and introduces interface transformer elements in our transmission-line treatment of the pertinent boundary conditions. Examples of application in quantum-well infrared photodetectors will be presented.. © 2000 Optical Society of America

关键词： electromagnetic fields

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Erratum: 'Monte Carlo Calculations of the Impulse Response in Bulk InAs for Low-Intensity Photon Avalanche Detection at Two Micron Wavelength'

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Japanese Journal of Applied Physics 2003年第4R期42卷

作者： Gundimada Satyanadh Ravindra Joshi Nurul Abedin Electro-Optics Branch Aerospace Electronics Systems Division NASA Langley Research Center Hampton VA 23681 U.S.A. Department of Electrical and Computer Engineering Old Dominion University Norfolk VA 23529-0246 U.S.A.

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OpenMP Parallel Implementation of Finite Difference Time Domain electromagnetism Application

OpenMP Parallel Implementation of Finite Difference Time Dom...

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2002 International Symposium on Distributed Computing and Applications for Business engineering and Science

作者： Joseph W.Haus Majeed M.Hayat Electro-Optics Program The University of Dayton Dayton OH45469-0245 Department of Electrical & Computer Engineering The University of New Mexico Albuquerque NM87131-1356

We report the OpenMP parallel implementation of a finite difference time domain (FDTD) method for computational electrodynamics. We have identified several time-intensive procedures in the program and parallelized the major loops within them after careful examination. Different loop scheduling schemes have been used and tested in order to reduce computation times. The final parallelized version speeds up the computation by nearly a factor of four between the single processor and eight processor test runs on an SGI Origin 2000 parallel system. The speedup plateaus after eight CPUs, but we expect better scalability will be achieved if larger problem sizes are used. Besides the advantage of reduced execution times, our parallel program can also solve FDTD problems of much larger sizes than the sequential code due to much larger memory space available to us on parallel systems.

关键词： domain OpenMP Parallel Implementation of Finite Difference Time Domain electromagnetism Application

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Microwave Characterization Of electro-Optic Polymers

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MRS Online Proceedings Library 2002年第1期734卷 9151-9156页

作者： Subramanyam, Guru Mathala, Prasanna Chevalier, Christine Davis, Antonio Yaney, Perry Grote, James Department of Electrical & Computer Engg. University of Dayton Dayton USA Analex Corp. NASA Glenn Research Center Cleveland USA Electro-Optics Graduate Program University of Dayton Dayton USA Electro-Optics and Department of Physics University of Dayton Dayton USA AFRL MLPS Materials and Manufacturing Directorate WPAFB Dayton USA

electro-optic polymer thin-films were characterized at microwave frequencies, for possible applications in GHz modulators. Single layers of the polymers were spin coated on low loss magnesium oxide substrates for characterizing the polymers at microwave frequencies. Coplanar waveguide test structures were designed for evaluation of the relative dielectric permittivity as well as the loss-tangent of the polymers at microwave frequencies. A conformal mapping technique was used for the extraction of relative dielectric constant of the polymer films based on the microwave scattering parameter measurements. As an example, a DR1-PMMA polymer had a relative dielectric permittivity of 3.01 and a loss-tangent of 0.075 at 8 GHz. The design of the test structures, the procedure for the accurate determination of the dielectric permittivity and the loss-tangent of the polymer films are discussed in this paper.

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Strong blue emission from isoelectronically P-doped GaN epilayers grown by gas source molecular beam epitaxy 12

Strong blue emission from isoelectronically P-doped GaN epil...

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12th International Conference on Molecular Beam Epitaxy, MBE 2002

作者： Juang, F.S. Hong, Y.G. Kim, M.H. Simpkins, B. Tu, C.W. Tsai, J. Lai, W.C. Department of Electrical and Computer Engineering University of California San Diego 9500 Gilman Drive San DiegoCA92093 United States South Epitaxy Corporation Tainan Science-based Industry Park Tainan County Taiwan Depart. of Electro-Optics Eng. National Huwei Inst. of Tech. Yunlin Taiwan Depart. of Materials Sci. and Eng. Kwangju Inst. of Sci. and Tech. Kwangju Korea Republic of

ISBN: (纸本)0780375815

The GaN-rich side of GaPxN1-x alloy exhibits a potentially large bandgap bowing with only a small amount of P incorporation. As a result, there could be interesting device applications. GaN:P layers were grown by molecular beam epitaxy (MBE) on GaN template layers grown by metalorganic chemical vapor deposition. GaP was used as the phosphorus source, P2, and the N2 plasma as the nitrogen source. © 2002 IEEE.

关键词： III-V semiconductors

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Strong blue emission from isoelectronically P-doped GaN epilayers grown by gas source molecular beam epitaxy

Strong blue emission from isoelectronically P-doped GaN epil...

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International Conference on Molecular Beam Epitaxy (MBE)

作者： F.S. Juang Y.G. Hong M.H. Kim B. Simpkins C.W. Tu J. Tsai W.C. Lai Depart of Electro-Optics Eng. National Huwei Inst. of Tech Yunlin Taiwan Department of Electrical and Computer Engineering University of California San Diego CA 92093 Department of Electrical and Computer Engineering University of California La Jolla CA USA Depart. of Materials Sci. and Eng. Kwangju Inst. of Sci. and Tech Kwangju Korea Tainan Science-based industry Park South Epitaxy Corporation Tainan County Taiwan

The GaN-rich side of GaP/sub x/N/sub 1-x/ alloy exhibits a potentially large bandgap bowing with only a small amount of P incorporation. As a result, there could be interesting device applications. GaN:P layers were grown by molecular beam epitaxy (MBE) on GaN template layers grown by metalorganic chemical vapor deposition. GaP was used as the phosphorus source, P/sub 2/, and the N/sub 2/ plasma as the nitrogen source.

关键词： Gallium nitride Molecular beam epitaxial growth Epitaxial growth Luminescence Lattices Drives computer industry Gas industry Photonic band gap Chemical vapor deposition

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