Light Scattering By Superlattice Acoustic Modes At Critical Points Of The Brillouin Zone

J. He; J. Sapriel; R. Azoulay; G. Le Roux; H. Brugger

doi:10.1117/12.947315

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18 August 1988 Light Scattering By Superlattice Acoustic Modes At Critical Points Of The Brillouin Zone

J. He, J. Sapriel, R. Azoulay, G. Le Roux, H. Brugger

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Proceedings Volume 0943, Quantum Well and Superlattice Physics II; (1988) https://doi.org/10.1117/12.947315
Event: Advances in Semiconductors and Superconductors: Physics and Device Applications, 1988, Newport Beach, CA, United States

Abstract

A combined Brillouin-Raman study has been performed in Si-Si1-xGex and GaAs-Al As superlattices. The photoelastic constant of Si0.5Ge0.5 with respect to Si for several light wavelengths is measured for the first time by light scattering experiments. The frequencies, linewidths and relative intensities of the superlattice acoustic phonon modes are carefully investigated, especially for scattering wavevectors in the vicinity of Brillouin zone boundaries. The acoustic and optical absorptions are found to have particular effects on the frequencies and relative intensities for scattering wavevectors in these regions.

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J. He, J. Sapriel, R. Azoulay, G. Le Roux, and H. Brugger "Light Scattering By Superlattice Acoustic Modes At Critical Points Of The Brillouin Zone", Proc. SPIE 0943, Quantum Well and Superlattice Physics II, (18 August 1988); https://doi.org/10.1117/12.947315

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