Now showing items 188-207 of 376

    • Magnetic properties of bulk Zn₁₋ₓMnₓO and Zn₁₋ₓCoₓO single crystals 

      Kane, Matthew Hartmann; Shalini, K.; Summers, C. J.; Varatharajan, R.; Nause, J.; Vestal, Christy Riann; Zhang, Z. John; Ferguson, Ian T. (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-12)
      Manganese and cobalt-doped ZnO have been produced using a modified melt-growth technique. X-ray diffraction measurements indicate that the samples are high-quality single crystals with ω−2θ full width at half maximum values ...
    • Manganese-induced long-range lattice disorder and vacancy formation in metal-organic chemical vapor deposition grown and ion-implanted Ga₁₋ₓMnₓN 

      Fenwick, William E.; Asghar, Ali; Gupta, Shalini; Kang, Hun; Strassburg, Martin; Dietz, Nikolaus; Graham, Samuel; Kane, Matthew Hartmann; Ferguson, Ian T. (Georgia Institute of TechnologyAmerican Vacuum Society, 2006-07)
      The structural properties and lattice dynamics of Ga₁₋ₓMnₓN were studied for Mn concentrations from 0.0% to 1.5%. Ga₁₋ₓMnₓN layers were fabricated by either Mn incorporation during the metal-organic chemical vapor deposition ...
    • Materials for multiphoton 3D microfabrication 

      Marder, Seth R.; Brédas, Jean-Luc; Perry, Joseph W. (Georgia Institute of TechnologyMaterials Research Society, 2007-07)
      Two-photon/multiphoton lithography (MPL) has emerged as a versatile technique for the fabrication of complex 3D polymeric, hybrid organic/inorganic, and metallic structures. This article reviews some recent advances in the ...
    • Measurement of complex Χ(3) using degenerate four-wave mixing with an imaged 2-D phase grating 

      Tseng, Shuo-Yen; Cao, Weilou; Peng, Yi-Hsing; Hales, Joel M.; Chi, San-Hui; Perry, Joseph W.; Marder, Seth R.; Lee, Chi H.; Herman, Warren N.; Goldhar, Julius (Georgia Institute of TechnologyOptical Society of America, 2006-09)
      We present a simple optical arrangement for phase sensitive detection of degenerate four-wave mixing (DFWM) to characterize the real and imaginary parts of c(3) using an imaged 2-D phase grating. Phase sensitive coherent ...
    • Mesoscale kinetic Monte Carlo simulations of molecular resists: effects of photoacid homogeneity on resolution, line-edge roughness, and sensitivity 

      Lawson, Richard A.; Henderson, Clifford L. (Georgia Institute of TechnologySociety of Photo-optical Instrumentation Engineers (SPIE), 2010-01)
      A 2-D kinetic Monte Carlo mesoscale model of molecular resists is developed to probe the effects of photoacid (PAG) homogeneity, specifically PAG aggregation behavior, on the resolution, sensitivity, and line-edge roughness ...
    • Metal-oxide complementary inverters with a vertical geometry fabricated on flexible substrates 

      Dindar, Amir; Kim, Jungbae; Fuentes-Hernandez, Canek; Kippelen, Bernard (Georgia Institute of TechnologyAmerican Institute of Physics, 2011-10)
      We report on the fabrication of p-channel thin film transistors (TFTs) and vertically stacked complementary inverters comprised of a p-channel copper oxide TFT on top of an n-channel indium gallium zinc oxide TFT fabricated ...
    • Metalloporphyrin polymer with temporally agile, broadband nonlinear absorption for optical limiting in the near infrared 

      Hales, Joel M.; Cozzuol, Matteo; Screen, Thomas E. O.; Anderson, Harry L.; Perry, Joseph W. (Georgia Institute of TechnologyOptical Society of America, 2009-10)
      A lead bis(ethynyl)porphyrin polymer possesses strong nonlinear absorption with unprecedented spectral/temporal coverage as a result of broad, overlapping two-photon and excited-state absorption bands with favorable ...
    • Micro-Raman thermometry in the presence of complex stresses in GaN devices 

      Beechem, Thomas; Christensen, Adam; Graham, Samuel; Green, D. (Georgia Institute of TechnologyAmerican Institute of Physics, 2008-06)
      Raman thermometry is often utilized to measure temperature in gallium nitride (GaN) electronics. However, the accuracy of the technique is subject to errors arising from stresses which develop during device operation as a ...
    • Microinterferometric optical phase tomography for measuring small, asymmetric refractive-index differences in the profiles of optical fibers and fiber devices 

      Bachim, Brent L.; Gaylord, Thomas K. (Georgia Institute of TechnologyOptical Society of America, 2005-01)
      A new technique, microinterferometric optical phase tomography, is introduced for use in measuring small, asymmetric refractive-index differences in the profiles of optical fibers and fiber devices. The method combines ...
    • Microjet cooling devices for thermal management of electronics 

      Kercher, Dan S.; Lee, Jeong-Bong; Brand, Oliver; Allen, Mark G.; Glezer, Ari (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2003-06)
      This research is an effort to demonstrate the applicability of miniaturized synthetic jet (microjet) technology to the area of thermal management of microelectronic devices. Synthetic jets are jets which are formed from ...
    • Microscopic observations and simulations of Bloch walls in nematic thin films 

      Zhou, Jian; Park, Jung Ok; De Luca, Gino; Rey, Alejandro D.; Srinivasarao, Mohan (Georgia Institute of TechnologyAmerican Physical Society, 2006-10)
      We study Bloch wall defects formed by quenching nematic thin films from planar anchoring to homeotropic anchoring through a temperature-driven anchoring transition. The director profiles of the walls are directly visualized ...
    • Microsensor integration into systems-on-chip 

      Brand, Oliver (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2006-06)
      Sensing systems-on-chip (SSoCs), combining micromachined sensing structures and microelectronic building blocks on a single chip, are reviewed. While single-chip pressure and inertial sensing systems have been commercially ...
    • Microwave assisted patterning of vertically aligned carbon nanotubes onto polymer substrates 

      Sunden, Erik Oscar; Moon, Jack K.; Wong, C. P.; King, William P.; Graham, Samuel (Georgia Institute of TechnologyAmerican Vacuum Society, 2006-07)
      This paper presents a low pressure hot embossing method for transferring patterns of vertically aligned carbon nanotubes into thermoplastic substrates. The procedure utilizes the synthesis of carbon nanotubes in discrete ...
    • 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 ...
    • Model for efficient simulation of spatially incoherent Right using the Wiener chaos expansion method 

      Badieirostami, Majid; Adibi, Ali; Zhou, Hao-Min; Chow, Shui-Nee (Georgia Institute of TechnologyOptical Society of America, 2007-11)
      We demonstrate a new and efficient technique for modeling and simulation of spatially incoherent sources using the Wiener chaos expansion method. By implementing this new model, we show that a practical-size photonic ...
    • Modeling the propagation of optical beams in three-dimensional photonic crystals 

      Momeni, Babak; Badieirostami, Majid; Adibi, Ali (Georgia Institute of TechnologyOptical Society of America, 2008-05)
      We show that the propagation effects of optical beams in three-dimensional photonic crystal structures can be modeled using a direction-dependent effective diffractive index model. The parameters of the model (i.e., the ...
    • Multifunctional and compact spectrometers based on cylindrical beam volume holograms 

      Momtahan, Omid; Hsieh, Chaoray; Adibi, Ali (Georgia Institute of TechnologyOptical Society of America, 2007-11)
      We propose a new class of slitless spectrometers using cylindrical beam volume holograms. These holograms disperse an input beam in one direction in an output plane while they do not affect the beam in the perpendicular ...
    • 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 ...
    • A multimode analysis of the gas-phase photoelectron spectra in oligoacenes 

      Malagoli, Massimo; Coropceanu, Veaceslav; da Silva Filho, Demetrio A.; Brédas, Jean-Luc (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-04)
      We present a multimode vibrational analysis of the gas-phase ultraviolet photoelectron spectra of the first ionization in anthracene, tetracene, and pentacene, using electron-vibration constants computed at the density ...
    • Multimode interferometric sensors on silicon optimized for fully integrated complementary-metal-oxide-semiconductor chemical-biological sensor systems 

      Lillie, Jeffrey J.; Thomas ,Mikkel A.; Jokerst, Nan M.; Ralph, Stephen E.; Dennis, Karla A.; Henderson, Clifford L. (Georgia Institute of TechnologyOptical Society of America, 2006-04)
      We demonstrate an integrated evanescent-field multimode Mach–Zehnder interferometric chemical–biological sensor, fabricated on silicon, with sensitivity of parts per 10 9 achieved by modal pattern tracking and analysis. ...