Browsing Center for Organic Photonics and Electronics (COPE) by Issue Date
Now showing items 21-40 of 397
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Young modulus dependence of nanoscopic friction coefficient in hard coatings
(Georgia Institute of TechnologyAmerican Institute of Physics, 2003-08)We present an atomic force microscope study of nanoscopic sliding friction on diamond, diamond-like carbon, and on three CrN thin films with varying hardness obtained by different growth temperatures. For the CrN films, ... -
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 ... -
Incongruent reduction of tungsten carbide by a zirconium-copper melt
(Georgia Institute of TechnologyMaterials Research Society, 2003-09)The reduction of tungsten carbide (WC) to elemental tungsten by reaction with a Zr-Cu melt was examined. Dense WC disks were immersed in a vertical orientation in molten Zr₂Cu at 1150-1400 °C for 1.5-24 h. Continuous, ... -
Fabrication of microchannels using polynorbornene photosensitive sacrificial materials
(Georgia Institute of TechnologyElectrochemical Society, 2003-09)A processing method has been demonstrated for the fabrication of microchannels using photosensitive polynorbornene copolymer based sacrificial materials. The channel geometric patterns of sacrificial polymer were made via ... -
Multimodal multiplex spectroscopy using photonic crystals
(Georgia Institute of TechnologyOptical Society of America, 2003-09)Spatio-spectral transmission patterns induced on low coherence fields by disordered photonic crystals can be used to construct optical spectrometers. Experimental results suggest that 1–10 nm resolution multimodal spectrometers ... -
Substrate-embedded and flip-chip-bonded photodetector polymer-based optical interconnects: Analysis, design, and performance
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers ; Optical Society of America, 2003-10)The performance of three optoelectronic structures incorporating substrate-embedded InP-based inverted metal–semiconductor–metal photodetectors and/or volume holographic gratings are analyzed and compared at the primary ... -
On the polarization of the green emission of polyfluorenes
(Georgia Institute of TechnologyAmerican Institute of Physics, 2003-10)An experimental and theoretical study of the anisotropic optical properties of polyfluorenes (PFs) bearing ketonic defects is presented. Polarized emission experiments performed on photooxidized aligned PF layers indicate ... -
Systematic design of single-mode coupled-resonator optical waveguides in photonic crystals
(Georgia Institute of TechnologyOptical Society of America, 2003-10)By establishing a direct relation between the dispersion and the field profile of a coupled-resonator optical waveguide (CROW) and those of its constituent cavities, we present a systematic method for the design of a ... -
Development of improved photosensitive polycarbonate systems for the fabrication of microfluidic devices
(Georgia Institute of TechnologyAmerican Vacuum Society, 2003-11)A technique was recently developed for the fabrication of microfluidic devices that involves using thermally sacrificial polymeric materials in conjunction with other conventional microelectronic processes. This method ... -
N,N-Dimethyl-N'-[(1E,2E)-3-(4-nitrophenyl)prop-2-enylidene]benzene-1,4-diamine and N,N-dimethyl-4-[(1E,3E)-4-(4-nitrophenyl)buta-1,3-dienyl]-1-naphthylamine
(Georgia Institute of TechnologyInternational Union of Crystallography, 2003-11)Syntheses and X-ray structural investigations have been carried out for the two title compounds, viz. C(17)H(17)N(3)O(2), (I), and C(22)H(20)N(2)O(2), (II). The molecular skeleton of (I) is slightly non-planar; the dihedral ... -
Electron beam lithography process using radiation sensitive carboxylate metalorganic precursors
(Georgia Institute of TechnologyAmerican Vacuum Society, 2003-11)A bilayer process has been developed for electron beam lithography using radiation sensitive metalorganic precursors as imaging layers in conjunction with organic planarizing layers. Upon electron beam irradiation, the ... -
Sea of polymer pillars: Compliant wafer-level electrical-optical chip I/O interconnections
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2003-11)An electrical–optical chip input–output (I/O) interconnection technology called sea of polymer pillars (SoPP) is presented. SoPP provides highly process-integrated and mechanically flexible (compliant) electrical–optical ... -
Polarization-dependent loss and birefringence in long-period fiber gratings
(Georgia Institute of TechnologyOptical Society of America, 2003-12)Widely used descriptions and relationships for birefringence and polarization-dependent loss (PDL), developed primarily for ultraviolet-induced long-period fiber gratings (LPFGs) written in optical fiber, can be invalid ... -
Mode dispersion in biperiodic photonic crystal waveguides
(Georgia Institute of TechnologyAmerican Physical Society, 2003-12)We propose and analyze biperiodic photonic crystal waveguides, where there are two sets of discrete translational symmetry along the propagation direction of the photonic crystal waveguides. We present a general method ... -
Effect of an external electric field on the charge transport parameters in organic molecular semiconductors
(Georgia Institute of TechnologyAmerican Institute of Physics, 2003-12)Internal reorganization energies and interchain transfer integrals are two key parameters governing the charge-transport properties of organic semiconducting materials. Here, in order to model some aspects of device operation ... -
Direct photopatterning of metal oxide structures using photosensitive metallorganics
(Georgia Institute of TechnologyElectrochemical Society, 2004)A novel process employing photosensitive metallorganic precursor materials is used to pattern thin-film mixed-metal oxide structures. In this process a photosensitive metallorganic precursor is coated onto a silicon substrate ... -
Optical transmission of polymer pillars for chip I/O optical interconnections
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2004-01)In the pursuit of high-density wafer-level input–output optical interconnections, microscopic polymer pillars have recently been fabricated. The optical performance of these pillars is critical for their potential ... -
Optical single-angle plane-wave transmittances/reflectances from Schwarzschild objective variable-angle measurements
(Georgia Institute of TechnologyAmerican Institute of Physics, 2004-02)Photonic crystal structures and other nanoscale and microscale optical structures are centrally important to future device technology. The fundamental infrared single-angle plane-wave experimental characterization of these ... -
Using interdigitated electrodes for measuring photoacid generator kinetics in chemically amplified resists
(Georgia Institute of TechnologyElectrochemical Society, 2004-02)In this work, the feasibility of using interdigitated electrodes to measure the kinetics of photoacid generation in a resist film has been examined. Interdigitated electrodes provide a quick, noninvasive, nondestructive ... -
Prototype CO₂ laser-induced long-period fiber grating variable optical attenuators and optical tunable filters
(Georgia Institute of TechnologyOptical Society of America, 2004-03)Prototype devices capable of variable attenuation at a fixed wavelength, wavelength tuning at a constant attenuation, and combinations of these spectral characteristics are demonstrated in CO₂ laser-induced long-period ...