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arxiv: 1109.5260 · v2 · pith:PDZ2BSZFnew · submitted 2011-09-24 · ❄️ cond-mat.mtrl-sci · cond-mat.other

Coherent Control of Acoustic Phonons in hybrid Metal-Semiconductor System

Meg Mahat (1) , Sergio Periera (2) , Ian M. Watson (3) , T.Y. Choi (4) , Arup Neogi (1) ((1) Department of Physics , University of North Texas , (2) CICECO , University of Aveiro
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Portugal (3) Institutes of Photonics SUPA University of Strathclyde Glasgow U.K. (4) Department of Mechanical Energy Engineering University of North Texas)
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classification ❄️ cond-mat.mtrl-sci cond-mat.other
keywords metalacousticcoherentnanoparticlesoscillationsphononssystemzflaps
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We demonstrate the modification of coherent zone-folded longitudinal acoustic phonons (ZFLAPs) oscillations in InGaN/GaN multiple quantum wells by the inclusion of metal nanoparticles (Au and Ag) via self-assembled inverted hexagonal pits. Blueshift and redshift have been observed in photoluminescence spectra due to the effect of electrostatic charge of metal nanoparticles (NPs). A change in periodicity of ZFLAPs oscillations were demonstrated due to the metal NPs inserted in the material system.

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