Strong optical nonlinearities in porous silicon: Femtosecond nonlinear transmission study

被引：30

作者：

Klimov, V ^{[1
]}

McBranch, D ^{[1
]}

Karavanskii, V ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST GEN PHYS,MOSCOW 117942,RUSSIA

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.52.R16989

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Large photoinduced absorption is observed in free-standing porous-silicon films in the spectral range from 1.1 to 2.5 eV by using a femtosecond pump-and-probe technique. The measured nonlinear transmission spectra have a very fast component with initial decay on the subpicosecond time scale. The spectral structure and temporal behavior of induced absorption show the presence of molecularlike Si complexes with well-defined energy levels and spectrally uniform picosecond relaxation dynamics.

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页码：16989 / 16992

页数：4

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