Optical properties of submicron filament silicon crystals

Y. G. Gule; Alla Ivanova Klimovskaya; Galina Yu. Rudko; Mikhail Ya. Valakh; I. P. Ostrovskii; G. G. Tsebulya

doi:10.1117/12.226199

3 November 1995 Optical properties of submicron filament silicon crystals

Y. G. Gule, Alla Ivanova Klimovskaya, Galina Yu. Rudko, Mikhail Ya. Valakh, I. P. Ostrovskii, G. G. Tsebulya

Proceedings Volume 2648, International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics; (1995) https://doi.org/10.1117/12.226199
Event: International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, 1995, Kiev, Ukraine

Abstract

The results of light scattering and photoluminescence investigations of sub micron free- standing silicon crystals are presented. Measurements were carried out within the wavelength range 0.2 - 1.5 micrometer. It was found that if the size of micro crystals is less than 1 micrometer, the peak of (L₃ - L'₃)-transition in the absorption spectrum shifts towards larger photon energies. We have found also that the micro crystals are the strongly depolarizing medium, and the depolarization depends on wavelength and angle of observation. Moreover, s- and p-polarized scattered light spectral dependences are different. The photoluminescence spectra of the crystals of micron and submicron scale are essentially different from the conventional bulk silicon spectra. At 4.2 K temperature we have observed new visible and several infra-red photoluminescence bands. While at room temperature only visible light band was found. The results obtained are treated using the Mie's theory and the suggestion of the surface atomic layers reconstruction.

Citation Download Citation

Y. G. Gule, Alla Ivanova Klimovskaya, Galina Yu. Rudko, Mikhail Ya. Valakh, I. P. Ostrovskii, and G. G. Tsebulya "Optical properties of submicron filament silicon crystals", Proc. SPIE 2648, International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, (3 November 1995); https://doi.org/10.1117/12.226199

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KEYWORDS

Crystals

Silicon

Scattering

Absorption

Light scattering

Anisotropy

Luminescence

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