OPTICAL NONLINEARITY OF SEMICONDUCTOR-DOPED GLASSES AT FREQUENCIES BELOW THE BAND-GAP - THE ROLE OF FREE-CARRIERS

	OPTICAL NONLINEARITY OF SEMICONDUCTOR-DOPED GLASSES AT FREQUENCIES BELOW THE BAND-GAP - THE ROLE OF FREE-CARRIERS
其他题名	论文其他题名
	Banfi G. P.; Degiorgio V.; Tan H. M.
	1995
发表期刊	Journal of the Optical Society of America B-Optical Physics
ISSN	0740-3224
卷号	12 期号:4 页码:621-628
摘要	We have studied, through time-resolved degenerate-four-wave mixing, the nonlinear response below the band gap of glasses doped with CdTe and CdS1-xSex nanocrystals by using 30-ps pulses from a Nd:YAG laser in the intensity range 0.4-1.6 GW/cm2. We found that the third-order nonlinearity is overshadowed by a fifth-order one when the band gap of the semiconductor crystallites became smaller than twice the photon energy. The fifth-order response, which is due to the refraction from the free carriers generated by two-photon absorption, does not saturate up to the highest intensity (corresponding to an electron-hole density in the crystallites N almost-equal-to 10(19) cm-3) and decays on a nanosecond time scale. We derive sigma, the ratio between the refractive-index change and N (sigma = 3-4 x 10(-21 cm3 for CdTe nanocrystals) and compare it with the values for bulk semiconductors.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25440
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Banfi G. P.,Degiorgio V.,Tan H. M.. OPTICAL NONLINEARITY OF SEMICONDUCTOR-DOPED GLASSES AT FREQUENCIES BELOW THE BAND-GAP - THE ROLE OF FREE-CARRIERS[J]. Journal of the Optical Society of America B-Optical Physics,1995,12(4):621-628.
APA	Banfi G. P.,Degiorgio V.,&Tan H. M..(1995).OPTICAL NONLINEARITY OF SEMICONDUCTOR-DOPED GLASSES AT FREQUENCIES BELOW THE BAND-GAP - THE ROLE OF FREE-CARRIERS.Journal of the Optical Society of America B-Optical Physics,12(4),621-628.
MLA	Banfi G. P.,et al."OPTICAL NONLINEARITY OF SEMICONDUCTOR-DOPED GLASSES AT FREQUENCIES BELOW THE BAND-GAP - THE ROLE OF FREE-CARRIERS".Journal of the Optical Society of America B-Optical Physics 12.4(1995):621-628.

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