PICOSECOND OPTICAL NONLINEARITIES IN LEAD CHALCOGENIDE SEMICONDUCTORS

被引：11

作者：

KLANN, R ^{[1
]}

BUHLEIER, R ^{[1
]}

ELSAESSER, T ^{[1
]}

LAMBRECHT, A ^{[1
]}

机构：

[1] FRAUNHOFER INST PHYS MESSTECH, W-7800 FREIBURG, GERMANY

来源：

APPLIED PHYSICS LETTERS | 1991年 / 59卷 / 08期

关键词：

D O I：

10.1063/1.106381

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical nonlinearities of PbSe are studied in picosecond pump-probe experiments at wavelengths from 4 to 8-mu-m. Excitation of an electron-hole plasma leads to a shift of the absorption edge to higher energies and to large changes of the refractive index by up to -0.1 for a carrier density of 4 X 10(17) cm-3. The optical nonlinearities result from band filling by both electrons and holes. The time-dependent absorption change shows a partial recovery within 100 ps, giving evidence of enhanced recombination rates. Theoretical calculations of the absorption change are in agreement with the experimental data.

引用

页码：885 / 887

页数：3

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