Nonlinear-transmission spectra of porous silicon: Manifestation of size quantization

V. I. Klimov, V. S. Dneprovskii, V. A. Karavanskii

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Changes in the transmission of porous silicon layers induced by ultrashort laser pulses are studied by using picosecond pump and probe measurements. Bleaching bands attributed to the saturation of optical transitions in silicon wires or/and crystallites with nanometer dimensions are observed in time-resolved differential transmission spectra. The measured nonlinearity is characterized by a relatively high value of the third-order nonlinear susceptibility (≊10-8 esu) and by fast relaxation dynamics (transmission recovery time is 30-40 ps).

Original languageEnglish
Pages (from-to)2691-2693
Number of pages3
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 1994

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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