2-PHOTON ABSORPTION IN SEMICONDUCTOR NANOCRYSTALS

被引：49
|
作者：
BANFI, GP [1 ]
DEGIORGIO, V [1 ]
GHIGLIAZZA, M [1 ]
TAN, HM [1 ]
TOMASELLI, A [1 ]
机构：
[1] ACAD SINICA,CHANGCHUN INST OPT & FINE MECH,CHANGCHUN,PEOPLES R CHINA
来源：
PHYSICAL REVIEW B | 1994年 / 50卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.50.5699
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Measurements of the two-photon absorption coefficient in semiconductor-doped glasses were performed. The imaginary part of the third-order optical susceptibility in the semiconductor particles is derived by combining nonlinear-optical-transmission data with small-angle neutron-scattering (SANS) results, which give the volume fraction of the nanocrystals. We find that the absorptive nonlinearity of the nanocrystals (with radii, also measured by SANS, in the range 2-11 nm) is close to that of the bulk semiconductor, in contrast to recent predictions and data.
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页码：5699 / 5702
页数：4
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