Now showing items 41-60 of 397

    • Area-selective ALD of titanium dioxide using lithographically defined poly (methyl methacrylate) films 

      Sinha, A.; Hess, Dennis W.; Henderson, Clifford L. (Georgia Institute of TechnologyElectrochemical Society, 2006)
      An approach to area-selective atomic layer deposition techniques based on the use of a lithographically definable polymeric masking layer has been reported. Successful direct patterned deposition of TiO2 is demonstrated ...
    • Conformally coating vertically aligned carbon nanotube arrays using thermal decomposition of iron pentacarbonyl 

      Hildreth, Owen; Cola, Baratunde; Graham, Samuel; Wong, C. P. (Georgia Institute of TechnologyAmerican Vacuum Society, 2012-05)
      Conformally coating vertically aligned carbon nanotubes (v-CNT) with metals or oxides can be difficult because standard line-of-sight deposition methods, such as dc sputter coating and electron-beam evaporation, are hindered ...
    • Comparison of positive tone versus negative tone resist pattern collapse behavior 

      Yeh, Wei-Ming; Noga, David E.; Lawson, Richard A.; Tolbert, Laren M.; Henderson, Clifford L. (Georgia Institute of TechnologyAmerican Vacuum Society, 2010-11)
      In this work, e-beam lithography patterns have been specifically designed and fabricated which provide the opportunity to probe the collapse behavior of both positive and negative tone systems. The pattern layout includes ...
    • 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 ...
    • Challenges of laser-cooling molecular ions 

      Nguyen, Jason H.V.; Viteri, C. Ricardo; Hohenstein, Edward G.; Sherrill, C. David; Brown, Kenneth R.; Odom, Brian (Georgia Institute of TechnologyInstitute of Physics, 2011-06)
      The direct laser cooling of neutral diatomic molecules in molecular beams suggests that trapped molecular ions can also be laser cooled. The long storage time and spatial localization of trapped molecular ions provides ...
    • Proximity Lithography in Sub-10 Micron Circuitry for Packaging Substrate 

      Wang, Fengtao; Liu, Fuhan; Kong, Linghua; Sundaram, Venky; Tummala, Rao R.; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2010-11)
      Rapid changes in the semiconductor industry will continue toward higher functionality that leads to higher input/outputs (I/O) counts, pushing packaging towards higher density architectures. In the next two to three ...
    • A Temperature-Insensitive Third-Order Coupled-Resonator Filter for On-Chip Terabit/s Optical Interconnects 

      Li, Qing; Yegnanarayanan, Siva; Soltani, Mohammad; Alipour, Payam; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2010-12)
      We design and demonstrate a temperature-insensitive third-order coupled-resonator filter in the silicon-on-insulator platform for on-chip terabit/s optical interconnects. Optimum filter design enables up to 21 flat-band ...
    • Multipath Fading Measurements at 5.8 GHz for Backscatter Tags With Multiple Antennas 

      Griffin, Joshua D.; Durgin, Gregory D. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2010-11)
      Multipath fading can be heavy for ultra-high frequency (UHF) and microwave backscatter radio systems used in applications such as radio frequency identification (RFID). This paper presents measurements of fading on the ...
    • Effect of Stress Due to Plastic Package Moisture Absorption in Hall Sensors 

      Cesaretti, Juan Manuel; Taylor, W. P.; Monreal, G.; Brand, Oliver (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-06)
      Commercial magnetic sensors based on the Hall effect are usually encapsulated in non-hermetic plastic packages. These plastic packages are known to swell in high humidity conditions due to moisture absorption. This swelling ...
    • Revisiting the Spread Spectrum Sliding Correlator: Why Filtering Matters 

      Pirkl, Ryan J.; Durgin, Gregory D. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-07)
      A wireless channel sounder based upon the conventional spread spectrum sliding correlator implementation uses unfiltered pseudo-random noise (PN) at both the transmitter and receiver to generate a time-dilated copy of ...
    • Quasi 2-D Field Reconstruction Using the Conjoint Cylindrical Wave Expansion 

      Pirkl, Ryan J.; Durgin, Gregory D. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-04)
      Off-the-horizon propagation severely degrades the accuracy of any field reconstruction technique that presupposes a two-dimensional (2-D) wireless channel. Therefore, employing the 2-D cylindrical wave expansion (CWE) ...
    • Adaptive Optics based Telescope Arrays Receiver for Compensation of Optical Turbulence Effects in a Deep-Space Optical Communication link with Mars 

      Hashmi, A.; Eftekhar, Ali Asghar; Adibi, Ali; Amoozegar, Farid (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 ...
    • Functionalization of high frequency SAW RFID devices for ozone dosimetry 

      Westafer, Ryan S.; Levitin, Galit; Hess, Dennis W.; Bergin, Michael H.; Edmonsonx, Peter J.; Hunt, William D. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009)
      In this paper we report new work on the gravimetric detection of ozone at EPA and OSHA relevant concentrations (approximately 100 ppb) in filtered ambient air. We have extended our proof-of-concept work which used both ...
    • Analysis of telescope arrays based receiver for deep-space optical communications with Mars 

      Hashmi, A.; Eftekhar, Ali Asghar; Adibi, Ali; Amoozegar, Farid (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.
    • Large-scale array of small high-Q microdisk resonators for on-chip spectral analysis 

      Soltani, Mohammad; Li, Qing; Yegnanarayanan, Siva; Momeni, Babak; Eftekhar, Ali Asghar; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-10)
      We demonstrate on-chip, large-scale arrays of small high-Q microdisk resonators, suitable for both in-plane coupling and out-of-plane (imaging) spectral analysis devices with high resolution (linewidth < 50pm to 0.5nm), ...
    • Sub-microsecond thermal reconfiguration of silicon photonic devices 

      Atabaki, Amir H.; Eftekhar, Ali A.; Yegnanarayanan, Siva; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-10)
      Using the experimental data we show the possibility of sub-microsecond reconfiguration of silicon photonics microresonators through pulse shaping of micro-heater excitation. Also, a novel heater structure based on small ...
    • A row-action based L₁-minimization approach to robust fluorescent tomography 

      Mohajerani, Pouyan; Behrooz, Ali; Eftekhar, Ali A.; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-10)
      We present a row-action method based on minimization of the L₁ norm for improving the accuracy of fluorescent tomography in reconstruction of fluorescent objects. The method is validated using a CW system and milk-based ...
    • Athermal operation in polymer-clad silicon microdisk resonators 

      Alipour, Payam; Hosseini, Ehsan Shah; Eftekhar, Ali Asghar; Momeni, Babak; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-10)
      We have used a urethane polymer as cladding to reduce the temperature sensitivity of resonance in high-Q silicon microdisk resonators. A two-order-of-magnitude improvement in resonance stability is demonstrated, and ...
    • Sustained GHz oscillations in ultra-high Q silicon microresonators 

      Soltani, Mohammad; Yegnanarayanan, Siva; Li, Qing; Atabaki, Amir; Eftekhar, Ali A.; Adibi, Ali (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009)
      We report the experimental observation of long-sustained GHz electronic oscillations resulting from coupled electron-photon dynamics in ultra-high-Q Si microdisk resonators with CW pumping. Theoretical analysis identifies ...
    • Fabrication of a blue M x N pixel organic light-emitting diode video display incorporating a thermally stable emitter 

      Haldi, Andreas; Kim, Jung B.; Domercq, Benoit; Kulkarni, Abhishek P.; Barlow, Stephen; Gifford, Angela P.; Jenekhe, Samson A.; Marder, Seth R.; Kippelen, Bernard (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-04)
      A 7x11 pixel blue OLED display was fabricated using a patterned indium-tin-oxide (ITO) substrate. The fabrication process for an M x N pixel organic light-emitting diode (OLED) video display including an electrical insulating ...