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Proceedings Paper

Meta-acousto-optics: the interaction of light and sound in an acoustic negative index medium
Author(s): Partha P. Banerjee
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Paper Abstract

In acousto-optics (AO), light is diffracted by traveling ultrasound into upshifted or downshifted orders depending on their respective propagation vectors. In conventional AO (CAO), the acoustic group velocity has the same direction as the phase velocity, and hence, the acoustic propagation vector. However, in an acoustic metamaterial, the group velocity can be positive while the phase velocity is negative. The interaction between light and sound wave-vectors are different for meta AO (MAO), implying a new interpretation for upshifted and downshifted interactions in MAO. We provide a heuristic treatment and outline the theory for detailed analysis of interaction between light and pulsed and focused ultrasound in acoustic metamaterials.

Paper Details

Date Published: 10 September 2010
PDF: 7 pages
Proc. SPIE 7754, Metamaterials: Fundamentals and Applications III, 77540R (10 September 2010); doi: 10.1117/12.862163
Show Author Affiliations
Partha P. Banerjee, Univ. of Dayton (United States)

Published in SPIE Proceedings Vol. 7754:
Metamaterials: Fundamentals and Applications III
Allan D. Boardman; Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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