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  1. No Access

    Article

    Deformation, yield and ageing in glassy solids

    A brief review of molecular simulations of physical ageing in structural glasses and its influence on their mechanical properties is presented. Recent studies based on simple molecular models of glass forming ...

    J. Rottler, M. Warren in The European Physical Journal Special Topics (2008)

  2. No Access

    Chapter and Conference Paper

    The Formation of Halos via Mergers. The Organized and Organizing Dynamics of Mergers

    N-body models of the growth of large and small scale structures in the Universe have proved to be valuable tools in the quest for the values of fundamental cosmological parameters. From the shapes of halo rota...

    P. J. Quinn, W. H. Zurek, J. K. Salmon, M. Warren in Dynamics and Interactions of Galaxies (1990)

  3. No Access

    Chapter and Conference Paper

    Using Parallel Computers for Very Large N-Body Simulations: Shell Formation Using 180 K Particles

    We have used a parallel version of the Barnes-Hut C treecode running on a parallel supercomputer (a 512 node NCUBE) at the Caltech Concurrent Computing Project to follow the evolution of systems with very larg...

    J. Salmon, P. J. Quinn, M. Warren in Dynamics and Interactions of Galaxies (1990)

  4. No Access

    Article

    Room-temperature single-wavelength optical latching circuits using GaAs bistable devices as logic gates

    Room-temperature two-element latching circuits are experimentally demonstrated using GaAs multiple-quantum-well (MQW) nonlinear etalons under single-wavelength bistable operation. Signal power gains of up to 4...

    R. **, C. Hanson, M. Warren, D. Richardson, H. M. Gibbs… in Applied Physics B (1988)

  5. No Access

    Chapter

    GaAs Etalons and Waveguides: Bulk versus Multiple-Quantum-Well Material

    Nonlinear absorption spectra of bulk GaAs and 299-, 152-, and 76-Å GaAs/AlGaAs multiple-quantum-well (MQW) samples are reported. Nonlinear index spectra are calculated by Kramers-Kronig transformations of the ...

    H. M. Gibbs, G. Khitrova, S. Koch, N. Peyghambarian… in Laser Optics of Condensed Matter (1988)

  6. No Access

    Chapter and Conference Paper

    Room-Temperature Bulk GaAs: Dominant Nonlinearities, Fast-Recovery Gates, Arrays for Parallel Processing

    Reduction of continuum enhancement and band filling are the dominant optical nonlinearities at room temperature. Surface recombination gives a 30-ps recovery time following AND-gate operation. Reactive ion etc...

    H. M. Gibbs, N. Peyghambarian, Y. H. Lee… in Electro-optic and Photorefractive Materials (1987)

  7. No Access

    Chapter and Conference Paper

    Fabrication and Characterization of Arrays of GaAs All-Optical Logic Gates

    Optical bistable elements fabricated from gallium arsenide (GaAs) have demonstrated potential as optical logic elements for use in optical parallel processing systems [1]. In previous experiments, the devices ...

    M. Warren, Y. H. Lee, G. R. Olbright, B. P. McGinnis… in Optical Bistability III (1986)

  8. No Access

    Chapter and Conference Paper

    Simultaneous Optical Bistable Switching of Adjacent Pixels on ZnS and ZnSe Interference Filters

    Simultaneous switching of 10 pixels on a ZnSe interference filter has been demonstrated by using a fly’s eye lens array. Pattern recognition is demonstrated, and filter uniformity is discussed.

    R. **, L. Wang, R. W. Sprague, H. M. Gibbs, G. C. Gigioli… in Optical Bistability III (1986)