OPTICAL NONLINEARITY OF CDSE MICROCRYSTALLITES IN A SPUTTERED SIO2 FILM

被引：33

作者：

YUMOTO, J

SHINOJIMA, H

UESUGI, N

TSUNETOMO, K

NASU, H

OSAKA, Y

机构：

[1] HIROSHIMA UNIV, FAC ENGN, DEPT ELECT ENGN, HIROSHIMA 724, JAPAN

[2] MIE UNIV, FAC ENGN, DEPT IND CHEM, TSU, MIE 514, JAPAN

来源：

APPLIED PHYSICS LETTERS | 1990年 / 57卷 / 23期

关键词：

D O I：

10.1063/1.104176

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical nonlinearity of a sputtered SiO2 film containing CdSe microcrystallites with an average diameter of 15 Å is measured by degenerate four-wave mixing (DFWM) experiments. An effective nonlinear cross section σeff of 1.4×10-16 cm2 is obtained. The DFWM signal as a function of the probe delay time shows biexponential behavior with a fast decay time of 10 ps and a slow decay time of 60 ps, which give fast and slow carrier recombination times as 20 ps and 120 ps. The third-order susceptibility ∥χ(3)∥ is estimated to be 1.3×10-8 esu. The photodarkening and laser annealing effects which are serious problems for device applications are not observed.

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页码：2393 / 2395

页数：3

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