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
来源：
CONFERENCE DIGEST OF THE 2004 JOINT 29TH INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 12TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS | 2004年
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中图分类号：
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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