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Proceedings Paper

Semiconductor quantum dot superlattice for coherent acoustic phonon emission
Author(s): Alexander G. Khitun; Kang Lung Wang
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Paper Abstract

We present a novel concept of using quantum dot superlattices for coherent acoustic phonon emission. Coherent lattice wave generation is proposed by collective dot vibrations in a self-assembled quantum dot array, where superlattice structure acts as a phonon resonator. The dots vibrations are synchronized by an external electric field. The proposed scheme has advantage of low phonon scattering rate in quantum dots, that enables generating high intensity phonon beams at low amplitude of the pumping electric field. The advantage is illustrated by numerical simulations carried out for Si/Ge superlattice. The proposed scheme may find many phonon applications, such as for local temperature control, phonon assisted optical transition enhancement, and characterization of low-dimensional structures.

Paper Details

Date Published: 11 June 2003
PDF: 4 pages
Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); doi: 10.1117/12.514347
Show Author Affiliations
Alexander G. Khitun, Univ. of California/Los Angeles (United States)
Kang Lung Wang, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 5023:
10th International Symposium on Nanostructures: Physics and Technology
Zhores I. Alferov; Leo Esaki, Editor(s)

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