Anomalies of light and sound generation in photoexcited porous silicon

Ivan V. Blonskij; Michail S. Brodyn; Volodymyr A. Tkhoryk; Alexander G. Filin; J. P. Piryatinskij

doi:10.1117/12.226181

3 November 1995 Anomalies of light and sound generation in photoexcited porous silicon

Ivan V. Blonskij, Michail S. Brodyn, Volodymyr A. Tkhoryk, Alexander G. Filin, J. P. Piryatinskij

Proceedings Volume 2648, International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics; (1995) https://doi.org/10.1117/12.226181
Event: International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, 1995, Kiev, Ukraine

Abstract

Another pronounced anomaly of the fundamental properties of photoexcited porous silicon samples is reported -- namely, giant efficiency of sound photogeneration under the irradiation of nanosecond laser pulses. The origin of this anomaly is discussed. The good prospects are demonstrated of techniques based on photoacoustic effect for the studies of fundamental properties of porous Si, in particular, reconstruction of fundamental absorption edge with the option of in-depth profiling, description of the kinetic properties of carriers responsible for the emergence of red-orange emission band, reconstruction of the spectrum of non-radiative transitions.

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Ivan V. Blonskij, Michail S. Brodyn, Volodymyr A. Tkhoryk, Alexander G. Filin, and J. P. Piryatinskij "Anomalies of light and sound generation in photoexcited porous silicon", Proc. SPIE 2648, International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, (3 November 1995); https://doi.org/10.1117/12.226181

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KEYWORDS

Silicon

Absorption

Signal detection

Luminescence

Modulation

Diffusion

Pulsed laser operation

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