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, Portugal (3) Institutes of Photonics, SUPA,, University of Strathclyde, Glasgow, U.K.
TL;DR
This paper demonstrates how embedding metal nanoparticles in InGaN/GaN quantum wells can coherently modify acoustic phonon oscillations, affecting their spectral properties and periodicity, with potential implications for phononic device control.
Contribution
It introduces a novel method of controlling acoustic phonons in a hybrid metal-semiconductor system using self-assembled metal nanoparticles.
Findings
Blueshift and redshift in photoluminescence spectra due to metal NPs
Alteration of ZFLAP oscillation periodicity by metal NPs
Evidence of electrostatic charge effects on phonon behavior
Abstract
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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Taxonomy
TopicsAcoustic Wave Resonator Technologies · GaN-based semiconductor devices and materials · Thermal properties of materials