Abstract
Picosecond excitation-probe measurements using a far-infrared free-electron laser (CLIO) have revealed large nonlinearities for indium antimonide at 4.7 µm. A theoretical model is described to determine the cw third-order nonlinear susceptibility and the interband relaxation time of the semiconductor which were found to be -8.6×10-11 m2 V-2 and 0.3 ns, respectively. Furthermore, the observation of the associated coherent transient grating effects allows us to obtain a coherence time of the laser system (2.5 ps) and the ?(3) of the transient grating which was found to be -7.2×10-13 m2 V-2. The measurements were performed at room temperature on undoped bulk InSb. © 1995 American Institute of Physics.
Original language | English |
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Pages (from-to) | 3371-3375 |
Number of pages | 5 |
Journal | Journal of Applied Physics |
Volume | 78 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1995 |