NONLINEAR-TRANSMISSION SPECTRA OF POROUS SILICON - MANIFESTATION OF SIZE QUANTIZATION

Authors
KLIMOV VI DNEPROVSKII VS KARAVANSKII VA
Citation
Vi. Klimov et al., NONLINEAR-TRANSMISSION SPECTRA OF POROUS SILICON - MANIFESTATION OF SIZE QUANTIZATION, Applied physics letters, 64(20), 1994, pp. 2691-2693
Citations number
21
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
64
Issue
20
Year of publication
1994
Pages
2691 - 2693
Database
ISI
SICI code
0003-6951(1994)64:20<2691:NSOPS->2.0.ZU;2-0
Abstract
Changes in the transmission of porous silicon layers induced by ultras hort laser pulses are studied by using picosecond pump and probe measu rements. Bleaching bands attributed to the saturation of optical trans itions in silicon wires or/and crystallites with nanometer dimensions are observed in time-resolved differential transmission spectra. The m easured nonlinearity is characterized by a relatively high value of th e third-order nonlinear susceptibility (almost-equal-to 10(-8) esu) an d by fast relaxation dynamics (transmission recovery time is 30-40 ps) .