Strong optical nonlinearities in porous silicon: Femtosecond nonlinear transmission study
- 15 December 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 52 (24) , R16989-R16992
- https://doi.org/10.1103/physrevb.52.r16989
Abstract
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.Keywords
This publication has 30 references indexed in Scilit:
- Nonlinear-transmission spectra of porous silicon: Manifestation of size quantizationApplied Physics Letters, 1994
- Correlation between photoluminescence and surface species in porous silicon: Low-temperature annealingApplied Physics Letters, 1994
- Blue emission in porous silicon: Oxygen-related photoluminescencePhysical Review B, 1994
- Optical absorption evidence for quantum confinement effects in porous siliconSolid State Communications, 1994
- Photoluminescence-excitation spectroscopy of porous siliconPhysical Review B, 1994
- Fast and slow visible luminescence bands of oxidized porous SiApplied Physics Letters, 1994
- Spectroscopic identification of the luminescence mechanism of highly porous siliconJournal of Luminescence, 1993
- Microstructure and optical properties of free-standing porous silicon films: Size dependence of absorption spectra in Si nanometer-sized crystallitesPhysical Review B, 1993
- Optical absorption evidence of a quantum size effect in porous siliconApplied Physics Letters, 1993
- Anomalous temperature dependence of photoluminescence in porous siliconApplied Physics Letters, 1993