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We present an experimental investigation of the nonlinear response of acceptor impurities in semiconductors to coherent excitation with intense THz fields. In Zn-doped GaAs, we observed a well-defined saturation of the transition from the impurity ground state to the excited states and valence band. In B-doped Si, however, there is a clear indication of field-induced distortion of the impurity energy...
We investigate the temperature dependence and non-equilibrium dynamics of the phase-phonon bands in a quasi-one-dimensional charge-density-wave system, blue bronze (K0.3MoO3), using optical-pump terahertz-probe spectroscopy, and interpret the results based on an extended time-dependent Ginzburg-Landau model for the coupled charge-lattice modes.
We demonstrate experimentally the relativistic Doppler frequency up-conversion of the THz pulses from the counter-propagating ionized plasma front in silicon. The observed frequency up-conversion can be well modeled by the 1D FDTD simulations if significant short scattering time (well below 10 fs) in the plasma is assumed. To further elucidate the scattering rate in the electro-hole plasma, we performed...
As an unconventional gas resource, shale gas is an practically alternative energy. Through the analysis of the current situation of shale gas development at home and abroad, this paper ascertains the influencing factors of the development prospect of the shale gas mainly from the aspects of the potential of the shale gas reservoirs, the controlling factors on the development technology of shale gas...
To model a high-resolution 3D human body model based on a set of image is a challenge work. In this paper, we present the 3D human body model reconstructed technique based on a generic model deformation method and a color texture standardization technique. Firstly a set feature points on images and their corresponding character vertices on generic model are defined. Then a customized model is yielded...
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