Scattering of light by sound on a nanoscale

Adnen Mlayah; Jesse Groenen; Guillaume Bachelier; Fanny Poinsotte; Jean Roch Huntzinger; Maximilien Cazayous; Elena Bedel-Pereira; Alexandre Arnoult; Oliver G Schmidt; Nicolas Bertru; Cyrill Paranthoen; Olivier Dehaese

doi:10.1117/12.545503

1 September 2004 Scattering of light by sound on a nanoscale

Adnen Mlayah, Jesse Groenen, Guillaume Bachelier, Fanny Poinsotte, Jean Roch Huntzinger, Maximilien Cazayous, Elena Bedel-Pereira, Alexandre Arnoult, Oliver G Schmidt, Nicolas Bertru, Cyrill Paranthoen, Olivier Dehaese

Author Affiliations +

Proceedings Volume 5459, Optical Sensing; (2004) https://doi.org/10.1117/12.545503
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

We report on light scattering experiments (Raman-Brillouin) in semiconductor quantum wells and quantum dots nanostructures. All measurements were performed under resonant excitation of the optical transitions involving confined electronic states. The scattered light was detected in the very low-frequency range around the Rayleigh line. We observe strong oscillations of the scattered intensity. Their period and relative amplitudes depend on the sample characteristics (size, density and spatial distribution of nano-objects). We show that such signal originates from interference effects due to the interaction between sound waves and the excited electronic density. By comparing simulated and measured spectra, we are able to extract, from the experiments, sample characteristics such as average size and size distribution of quantum dots. This optical sensing technique, namely Raman interferometry, is similar to the well-known X-ray diffraction technique, in the sense that it allows imaging of electronic states in the reciprocal space. Moreover, we show that Raman interferometry is a surface sensitive technique. By using quantum dots and quantum wells as Thz acoustic-detectors we are able to measure the reflection of sound waves at the sample surface. The surface characteristics (nano-scale roughness and oxidation) can be addressed using this method.

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Adnen Mlayah, Jesse Groenen, Guillaume Bachelier, Fanny Poinsotte, Jean Roch Huntzinger, Maximilien Cazayous, Elena Bedel-Pereira, Alexandre Arnoult, Oliver G Schmidt, Nicolas Bertru, Cyrill Paranthoen, and Olivier Dehaese "Scattering of light by sound on a nanoscale", Proc. SPIE 5459, Optical Sensing, (1 September 2004); https://doi.org/10.1117/12.545503

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