Optical and magnetooptical study of photorefractive germanium-doped cadmium telluride

被引：13

作者：

Briat, B ^{[1
]}

Shcherbin, K ^{[1
]}

Farid, B ^{[1
]}

Ramaz, F ^{[1
]}

机构：

[1] ESPCI, Lab Opt Phys, F-75231 Paris 05, France

来源：

OPTICS COMMUNICATIONS | 1998年 / 156卷 / 4-6期

关键词：

cadmium telluride; germanium; CdTe : Ge; photorefractive crystals;

D O I：

10.1016/S0030-4018(98)00441-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A photorefractive CdTe:Ge single crystal was investigated via photo-absorption at room temperature, 98 K and 4.3 K, and magnetic circular dichroism at 1.4 K. At all wavelengths, except near 1064 nm, absorption spectra suffer relatively large changes under various illuminations. Magnetic circular dichroism demonstrates unambiguously the presence of two paramagnetic defects, one of them being the ionised donor Ge+ at the Cd site. Our results further reveal the existence of four absorption components around 0.94 eV, 1.10 eV, 1.22 eV and 1.36 eV. The two extreme ones are assigned to the photoneutralisation of Ge-Cd(+) and to the photoionisation of Ge-Cd(0) respectively. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：337 / 340

页数：4

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