Two-photon absorption attenuated THz generation in GaSe

	Two-photon absorption attenuated THz generation in GaSe
	Jiang, K.; J.-J. Xie; G.-L. Yang; J.-J. Xie; D.-J. Li and F. Chen
	2015
发表期刊	Faguang Xuebao/Chinese Journal of Luminescence
卷号	36 期号:3 页码:361-365
摘要	The broadband THz generation from 0.2 to 2.5 THz was measured as a function of pump intensity in a single pure gallium selenide crystal based on the optical rectification of ultrafast laser pulses. Two-photon absorption at 800 nm can generate free charge carriers which can absorb the generated THz radiation, and finally attenuate THz output. The result indicates that the pump intensity dependence of ouput THz radiation changes from square to sub-linear relationship and the saturation of output THz radiation appears at high pump intensity. To study the impact of two photon absorption on THz generation, the two photon absorption coefficient of GaSe at 800 nm is measured to be 0.165 cm/GW, which is determined by the measured nonlinear transmission. The THz output fitting result taking account of the free charge carrier absorption cross section of 110-15cm2is consistent with the experiment data very well. This estimation result can be used to optimize the conversion efficient of THz generation in GaSe crystal under intense laser pump. , 2015, Chines Academy of Sciences. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55976
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Jiang, K.,J.-J. Xie,G.-L. Yang,et al. Two-photon absorption attenuated THz generation in GaSe[J]. Faguang Xuebao/Chinese Journal of Luminescence,2015,36(3):361-365.
APA	Jiang, K.,J.-J. Xie,G.-L. Yang,J.-J. Xie,&D.-J. Li and F. Chen.(2015).Two-photon absorption attenuated THz generation in GaSe.Faguang Xuebao/Chinese Journal of Luminescence,36(3),361-365.
MLA	Jiang, K.,et al."Two-photon absorption attenuated THz generation in GaSe".Faguang Xuebao/Chinese Journal of Luminescence 36.3(2015):361-365.

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