Optical two-photon absorption in GaAs measured by optical pump - terahertz probe spectroscopy

被引:0
|
作者
Kadlec, F [1 ]
Nemec, H [1 ]
Kuzel, P [1 ]
机构
[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic
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TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A novel scheme of optical pump-THz probe experiments was used to study the nonlinear absorption in GaAs. The crystal was excited by ultrashort laser pulses with wavelength 810 nm. and fluences up to 4.2 mJ/cm(2), for which the single-photon absorption (SPA) saturates and the two-photon absorption (TPA) dominates. The TPA coefficient beta and its anisotropy were detemiined.
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页码:497 / 498
页数:2
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