Now showing items 358-377 of 397

    • Thin Film Solar Cells. New Organic Materials, Large-scale Printing and Nanoparticles 

      Watkins, Scott (Georgia Institute of Technology, 2013-08-21)
      In this seminar I will present three main areas of our work on solution processed solar cells. In part one I will describe the development of new donor and acceptor materials for solution processed organic photovoltaics ...
    • Third-order optical autocorrelator for time-domain operation at telecommunication wavelengths 

      Ramos-Ortiz, Gabriel; Cha, Myoungsik; Thayumanavan, S.; Mendez, J. C.; Marder, Seth R.; Kippelen, Bernard (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-07)
      We report on amorphous organic thin films that exhibit efficient third-harmonic generation at telecommunication wavelengths. At 1550 nm, micrometer-thick samples generate up to 17 mW of green light with input power of 250 ...
    • Three-beam interference lithography methodology 

      Stay, Justin L.; Burrow, Guy M.; Gaylord, Thomas K. (Georgia Institute of TechnologyAmerican Institute of Physics, 2011-02)
      Three-beam interference lithography represents a technology capable of producing two-dimensional periodic structures for applications such as micro- and nanoelectronics, photonic crystal devices, metamaterial devices, ...
    • Three-beam-interference lithography: contrast and crystallography 

      Stay, Justin L.; Gaylord, Thomas K. (Georgia Institute of TechnologyOptical Society of America, 2008-06)
      Specific configurations of three linearly polarized, monochromatic plane waves have previously been shown to be capable of producing interference patterns exhibiting symmetry inherent in 5 of the 17 plane groups. Starting ...
    • Three-dimensional band structure and bandlike mobility in oligoacene single crystals: A theoretical investigation 

      Cheng, Y. C.; Silbey, R. J.; da Silva Filho, Demetrio A.; Calbert, J. P.; Cornil, Jerome; Brédas, Jean-Luc (Georgia Institute of TechnologyAmerican Institute of Physics, 2003-02)
      Quantum-chemical calculations coupled with a tight binding band model are used to study the charge carrier mobilities in oligoacene crystals. The transfer integrals for all nonzero interactions in four crystalline oligoacenes ...
    • Three-dimensional converging-diverging Gaussian beam diffraction by a volume grating 

      Wu, Shun-Der; Gaylord, Thomas K.; Glytsis, Elias N.; Wu, Yu-Ming (Georgia Institute of TechnologyOptical Society of America, 2005-07)
      The diffraction characteristics of a volume grating (VG) illuminated by a three-dimensional (3-D) converging-diverging Gaussian beam at conical incidence are investigated by applying 3-D finite-beam (FB) rigorous coupled-wave ...
    • Three-photon absorption in anthracene-porphyrin-anthracene triads: A quantum-chemical study 

      Zhu, Lingyun; Yang, Xia; Yi, Yuanping; Xuan, Pengfei; Shuai, Zhigang; Chen, Dezhan; Zojer, Egbert; Brédas, Jean-Luc; Beljonne, David (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-12)
      We have applied correlated quantum-chemical methods to investigate the three-photon absorption (3PA) response of a porphyrin triad derivative, where the central macrocycle is linked in mesopositions to two anthracene units ...
    • Time-dependent signatures of acoustic wave biosensors 

      Hunt, William D.; Stubbs, Desmond D.; Lee, Sang-Hun (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2003-06)
      Acoustic wave devices coated with a biolayer represent one biosensor approach for the detection of medically relevant biomolecules. In a typical application, the acoustic wave device is connected in an oscillator circuit, ...
    • Tip size effects on atomic force microscopy nanoindentation of a gold single crystal 

      Lucas, Marcel; Gall, Ken; Riedo, Elisa (Georgia Institute of TechnologyAmerican Institute of Physics, 2008-12-01)
      The effect of tip radius on atomic force microscopy (AFM) nanoindentation is investigated through indentation on the (111) face of a gold single crystal. The hardness is derived using two different methods: by measuring ...
    • A top surface imaging method using area selective ALD on chemically amplified polymer photoresist films 

      Sinha, Ashwini; Hess, Dennis W.; Henderson, Clifford L. (Georgia Institute of TechnologyElectrochemical Society, 2006)
      A method for performing top surface imaging TSI on a single polymeric photoresist film using area selective atomic layer deposition ALD is presented. In this method, exposure of the polymer thin film creates reactive ...
    • Top-gate hybrid complementary inverters using pentacene and amorphous InGaZnO thin-film transistors with high operational stability 

      Kim, Jungbae; Fuentes-Hernandez, Canek; Hwang, D. K.; Potscavage, William J., Jr.; Kippelen, Bernard (Georgia Institute of TechnologyAmerican Institute of Physics, 2012-03)
      We report on the operational stability of low-voltage hybrid organic-inorganic complementary inverters with a top-gate bottom source-drain geometry. The inverters are comprised of p-channel pentacene and n-channel amorphous ...
    • Toward ultimate miniaturization of high Q silicon traveling-wave microresonators 

      Soltani, Mohammad; Li, Qing; Yegnanarayanan, Siva; Adibi, Ali (Georgia Institute of TechnologyOptical Society of America, 2010-09)
      High Q traveling-wave resonators (TWR)s are one of the key building block components for VLSI Photonics and photonic integrated circuits (PIC). However, dense VLSI integration requires small footprint resonators. While ...
    • Transient absorption spectroscopy and quantum-chemical studies of matrix-isolated perylene derivatives 

      Engel, E.; Scholes, Gregory D.; Beljonne, David; Assa, J.; Froeb, H.; Leo, K.; Hoffmann, M.; Brédas, Jean-Luc (Georgia Institute of TechnologyAmerican Physical Society, 2006-06)
      We present a comprehensive experimental and theoretical study of the optical properties of matrix-isolated molecules of the two perylene derivatives N,N′-dimethylperylene-3,4,9,10-dicarboximide (MePTCDI) and 3,4,9,10-per ...
    • Transition state in a noisy environment 

      Bartsch, Thomas; Hernandez, Rigoberto; Uzer, Turgay (Georgia Institute of TechnologyAmerican Physical Society, 2005-07)
      Transition state theory overestimates reaction rates in solution because conventional dividing surfaces between reagents and products are crossed many times by the same reactive trajectory. We describe a recipe for ...
    • Transmission characteristics of long-period fiber gratings having arbitrary azimuthal/radial refractive index variations 

      Anemogiannis, E.; Glytsis, Elias N.; Gaylord, Thomas K. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers ; Optical Society of America, 2003-01)
      A numerical method is presented for determining the transmittance of long-period (LP) fiber-gratings having arbitrary azimuthal/radial refractive index variations. The method uses coupled- mode theory and includes both the ...
    • Transparent organic field-effect transistors with polymeric source and drain electrodes fabricated by inkjet printing 

      Zhang, Xiaohong; Lee, S. M.; Domercq, Benoit; Kippelen, Bernard (Georgia Institute of TechnologyAmerican Institute of Physics, 2008-06-16)
      Transparent organic field-effect transistors based on pentacene were fabricated on indium tin oxide (ITO)-coated glass using ITO as the gate electrode, Al2O3 grown by atomic layer deposition as the gate insulator, and an ...
    • Transport behavior of atomic layer deposition precursors through polymer masking layers: Influence on area selective atomic layer deposition 

      Sinha, Ashwini; Hess, Dennis W.; Henderson, Clifford L. (Georgia Institute of TechnologyAmerican Vacuum Society, 2007-09)
      Sorption and diffusion of precursors through polymer layers were considered as limitations to the successful implementation of a polymer film-based masking approach to area selective atomic layer deposition techniques (ASALDT). ...
    • Trapped hybrid modes in solidly mounted resonators based on c-axis oriented hexagonal crystals 

      Wathen, Adam D.; Munir, Farasat; Hunt, William D. (Georgia Institute of TechnologyAmerican Institute of Physics, 2010-12)
      Assuming an idealized piezoelectric bulk acoustic wave resonator, one typically calculates the velocity of the fundamental bulk acoustic mode as the measured frequency times twice the thickness of the piezoelectric film. ...
    • Tuning of resonance-spacing in a traveling-wave resonator device 

      Atabaki, Amir Hossein; Momeni, Babak; Eftekhar, Ali Asghar; Hosseini, Ehsan Shah; Yegnanarayanan, Siva; Adibi, Ali (Georgia Institute of TechnologyOptical Society of America, 2010-04)
      In this work a traveling-wave resonator device is proposed and experimentally demonstrated in silicon-on-insulator platform in which the spacing between its adjacent resonance modes can be tuned. This is achieved through ...
    • Two-wave-plate compensator method for full-field retardation measurements 

      Montarou, Carole C.; Gaylord, Thomas K.; Bachim, Brent L.; Dachevski, Alexei I.; Agrawal, Ankur (Georgia Institute of TechnologyOptical Society of America, 2006-01)
      The two-wave-plate compensator (TWC) method is expanded for full-field retardation measurements by use of a polarization microscope. The sample image is projected onto a CCD camera connected to a computer, allowing the ...