Now showing items 21-40 of 397

    • Young modulus dependence of nanoscopic friction coefficient in hard coatings 

      Riedo, Elisa; Brune, Harald (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 

      Khorasani, Sina; Adibi, Ali (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 

      Grzesik, Zbigniew; Dickerson, Matthew B.; Sandhage, Kenneth H. (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 

      Wu, X. Q.; Reed, H. A.; Wang, Y.; Rhodes, L. F.; Elce, E.; Ravikiran, R.; Shick, R. A.; Henderson, Clifford L.; Allen, S. A. B.; Kohl, P. A. (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 

      Xu, Zhaochun; Wang, Zhanglei; Sullivan, Michael E.; Brady, David J.; Foulger, Stephen H.; Adibi, Ali (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 

      Glytsis, Elias N.; Jokerst, Nan M.; Villalaz, Ricardo A.; Cho, Sang-Yeon; Wu, Shun-Der; Huang, Zhaoran; Brooke, Martin A.; Gaylord, Thomas K. (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 

      Yang, X. H.; Neher, D.; Spitz, C.; Zojer, Egbert; Brédas, Jean-Luc; Guntner, R.; Scherf, U (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 

      Soltani, Mohammad; Adibi, Ali; Xu, Yong; Lee, Reginald K. (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 

      White, Celesta E.; Henderson, Clifford L. (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 

      Nesterov, Volodymyr V.; Suina, Andrea; Antipin, Mikhail Yu; Timofeeva, Tatiana V.; Barlow, Stephen; Marder, Seth R. (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 

      Jeyakumar, Augustin; Henderson, Clifford L.; Roman, Paul; Suh, Seigi (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 

      Bakir, Muhannad S.; Gaylord, Thomas K.; Martin, Kevin P.; Meindl, James D. (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 

      Bachim, Brent L.; Gaylord, Thomas K. (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 

      Jafarpour, Aliakbar; Adibi, Ali; Xu, Yong; Lee, Reginald K. (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 

      Sancho-García, J. C.; Horowitz, G.; Brédas, Jean-Luc; Cornil, Jerome (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 

      Barstow, S.J.; Jeyakumar, A.; Roman, P.J.; Henderson, Clifford L. (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 

      Bakir, M. S.; Gaylord, T. K.; Ogunsola, O. O.; Glytsis, E. N.; Meindl, J. D. (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 

      Gaylord, Thomas K.; Kilby, Gregory R. (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 

      Berger, C.M.; Byers, J.D.; Henderson, Clifford L. (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 

      Braiwish, Mohammad I.; Bachim, Brent L.; Gaylord, Thomas K. (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 ...