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Bulk (111) and (100) InP wafers and nanoporous membranes have been studied using free space time-domain spectroscopy. The nonlinear optical response is shown to be dependent on heavy ion (Kr+15, Xe+23) dose, crystallographic orientation and subsequent pore formation whereby optical techniques are employed for the purpose of surface characterization.
We present results from wideband THz, low wave-number Raman, and FTIR measurements on benzoic acid and two of its derivatives. The low energy vibrational modes have been identified and compared with the results from calculations.
The effect of magnetic field on emitted terahertz radiation is useful for determination of the mechanism involved in THz generation. Semiconductor materials, which are potential sources of terahertz radiation, have been analyzed under the influence of in-plane magnetic field.
We report on a detailed study of the emission of terahertz-frequency electromagnetic radiation from layers of <roman>GaBi</roman>y<roman>As</roman>1-y (0≤y≪0.04) grown by molecular beam epitaxy on (311)B and (001) GaAs substrates. We measure two orthogonally polarized components of the terahertz radiation emitted under excitation by ultrashort near-infrared laser pulses in...
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