Two-photon absorption of femtosecond laser pulses in GaS crystals

被引：9
|
作者：
Allakhverdiev, KR [1 ]
机构：
[1] TUBITAK, Marmara Res Ctr, Inst Elect, TR-41470 Gebze, Kocaeli, Turkey
来源：
OPTICS COMMUNICATIONS | 1998年 / 149卷 / 1-3期
关键词：
semiconductors; optical properties; non-linear optics;
D O I：
10.1016/S0030-4018(97)00722-0
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Experimental results of the influence of high-power density (up to I-0=400 MW/cm(2)), ultrashort laser pulses with duration of 42 fs (FWHM, E = 1.98 eV) on the transient transmission change of layered GaS crystals at room temperature are reported. The strong absorption at Delta t=0 (zero time delay between pump and probe pulse) is identified as being due to two-photon direct interband transitions. The estimated value of the two-photon absorption coefficient is beta(dir) = (0.6 +/- 0.2) x 10(-3) cm/MW. (C) 1998 Elsevier Science B.V.
引用
收藏
页码：64 / 66
页数：3
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