Browsing Center for Organic Photonics and Electronics (COPE) by Title
Now showing items 4-23 of 397
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Aberration correction in wide-field fluorescence microscopy by segmented-pupil image interferometry
(Georgia Institute of TechnologyOptical Society of America, 2012-06)We present a new technique for the correction of optical aberrations in wide-field fluorescence microscopy. Segmented-Pupil Image Interferometry (SPII) uses a liquid crystal spatial light modulator placed in the microscope’s ... -
Absorbing boundary conditions for low group velocity electromagnetic waves in photonic crystals
(Georgia Institute of TechnologyOptical Society of America, 2011-03)We present an efficient method for the absorption of slow group velocity electromagnetic waves in photonic crystal waveguides (PCWs). We show that adiabatically matching the low group velocity waves to high group velocity ... -
Accurate and efficient techniques for the analysis of reflection at the interfaces of three-dimensional photonic crystals
(Georgia Institute of TechnologyOptical Society of America, 2007-12)We present two efficient and accurate models for the analysis and optimization of reflection at the interface of three-dimensional (3D) photonic crystal structures. For the most general photonic crystal interfaces, we ... -
Accurate cross-sectional stress profiling of optical fibers
(Georgia Institute of TechnologyOptical Society of America, 2009-09)A novel technique for determining two-dimensional, cross-sectional stress distributions in optical fibers and fiber-based devices is presented. Use of the Brace-Kohler compensator technique and a polarization microscope ... -
Accurate determination of microparticle size using Fourier transform of light scattering spectrum over wavenumber
(Georgia Institute of TechnologyOptical Society of America, 2007-05)We discovered that the far-field light scattering spectra of microparticles over wavenumber at a certain angle could be decomposed into periodic components, with an oscillation frequency linearly dependent on the particle ... -
Acoustic confinement and waveguiding with a line-defect structure in phononic crystal slabs
(Georgia Institute of TechnologyAmerican Institute of Physics, 2010-10)We present a new way of forming phononic crystal waveguides by coupling a series of line-defect resonators. The dispersion proprieties of these coupled resonator acoustic waveguides CRAW can be engineered by using their ... -
Adaptive Optics based Telescope Arrays Receiver for Compensation of Optical Turbulence Effects in a Deep-Space Optical Communication link with Mars
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009)Future deep-space exploration missions demand a broadband and integrated communication infrastructure to transport the scientific data to Earth. Optical communication employing optical arrays receiver is a viable ... -
Adaptive steered molecular dynamics: Validation of the selection criterion and benchmarking energetics in vacuum
(Georgia Institute of TechnologyAmerican Institute of Physics, 2012-06)The potential of mean force (PMF) for stretching decaalanine in vacuum was determined earlier by Park and Schulten [J. Chem. Phys. 120, 5946 (2004)] in a landmark article demonstrating the efficacy of combining steered ... -
Adiabatic matching stage for coupling of light to extended Bloch modes of photonic crystals
(Georgia Institute of TechnologyAmerican Institute of Physics, 2005-10)In this letter, we present a matching stage for reflection reduction based on the principle of gradual change to efficiently couple light to propagating modes of photonic crystals (PCs). Basic physical considerations in ... -
Algorithm performance in the determination of the refractive-index profile of optical fibers
(Georgia Institute of TechnologyOptical Society of America, 2008-02)Three algorithms for computing the refractive-index profile of azimuthally symmetric optical fibers via the inverse Abel transform are compared to determine their relative accuracies. Appropriate values of algorithm ... -
All-optical switching based on inverse Raman scattering in liquid-core optical fibers
(Georgia Institute of TechnologyOptical Society of America, 2012-03)We report on a new platform for all-optical switching based on inverse Raman scattering in liquids. Narrowband switching, which could be suitable for wavelength-division-multiplexed applications, is demonstrated using ... -
Analogies Between Digital Radio and Chemical Orthogonality as a Method for Enhanced Analysis of Molecular Recognition Events
(Georgia Institute of TechnologyMDPI, 2008-02)Acoustic wave biosensors are a real-time, label-free biosensor technology, which have been exploited for the detection of proteins and cells. One of the conventional biosensor approaches involves the immobilization of a ... -
Analysis of slitless holographic spectrometers implemented by spherical beam volume holograms
(Georgia Institute of TechnologyOptical Society of America, 2006-05)The analysis of a slitless volume holographic spectrometer is presented in detail. The spectrometer is based on a spherical beam volume hologram followed by a Fourier-transforming lens and a CCD. It is shown that the ... -
Analysis of telescope arrays based receiver for deep-space optical communications with Mars
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-10)Telescope arrays receivers are analyzed for deep-space optical communications between Earth and Mars. It is shown that data rates up to 14 M bits/sec are possible when Mars is at the farthest range from the Earth. -
Angular sensitivities of volume gratings for substrate-mode optical interconnects
(Georgia Institute of TechnologyOptical Society of America, 2005-07)The angular sensitivities of slanted volume gratings (VGs) illuminated by three-dimensional (3-D) converging-diverging spherical Gaussian beams for substrate-mode optical interconnects in microelectronics are analyzed by ... -
Anisotropies in the electrical properties of rod-like aggregates of liquid crystalline phthalocyanines: Direct current conductivities and field-effect mobilities
(Georgia Institute of TechnologyMaterials Research Society, 2004-07)The direct current (dc) conductivities and organic field-effect transistor (OFET) characteristics of a class of octa-substituted liquid crystalline (discotic mesophase) phthalocyanines (Pcs) are discussed. These molecules ... -
Approximate analysis and design of rectangular-lattice photonic crystals
(Georgia Institute of TechnologyOptical Society of America, 2003-08)We present a theoretical analysis of wave propagation in rectangular- and square-lattice photonic crystals by approximating the arbitrary refractive-index function with a staircase profile. This profile has a number of ... -
An approximate effective index model for efficient analysis and control of beam propagation effects in photonic crystals
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers ; Optical Society of America, 2005-03)Propagation of optical beams through a photonic crystal (PC) is analyzed and modeled. It is shown that the propagation effects for beams with slow spatial variations can be effectively modeled by diffraction behavior ... -
Area selective atomic layer, deposition of titanium dioxide: Effect of precursor chemistry
(Georgia Institute of TechnologyAmerican Vacuum Society, 2006-11)Area selective atomic layer deposition (ALD) of titanium dioxide using polymer films as masking layers has been investigated. A number of factors which must be considered while designing a successful area selective ALD ... -
Area-scaling of organic solar cells
(Georgia Institute of TechnologyAmerican Institute of Physics, 2009-09)We report on the performance of organic solar cells based on pentacene/ C₆₀ heterojunctions as a function of active area. Devices with areas of 0.13 and 7 cm² were fabricated on indium-tin-oxide (ITO) coated glass. Degradation ...