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Proceedings Paper

Slow light through tightly coupled light waves and acoustic waves in nanoscale waveguides
Author(s): Zheng Wang; Wenjun Qiu; Peter Rakich; Heedeuk Shin; Hui Dong
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Paper Abstract

We develop a general framework of evaluating slow-light performance using Stimulated Brillouin Scattering (SBS) in optical waveguides via the overlap integral between optical and elastic eigen-modes. We show that spatial symmetry of the optical force dictates the selection rules of the excitable elastic modes. By applying this method to a rectangular silicon waveguide, we demonstrate the spatial distributions of optical force and elastic eigen-modes jointly determine the magnitude and scaling of SBS gain coefficient in both forward and backward SBS processes. We further apply this method to inter-modal SBS process, and demonstrate that the coupling between distinct optical modes is necessary to excite elastic modes with all possible symmetries.

Paper Details

Date Published: 6 March 2013
PDF: 13 pages
Proc. SPIE 8636, Advances in Slow and Fast Light VI, 863607 (6 March 2013); doi: 10.1117/12.2010049
Show Author Affiliations
Zheng Wang, The Univ. of Texas at Austin (United States)
Wenjun Qiu, Massachusetts Institute of Technology (United States)
Peter Rakich, Yale Univ. (United States)
Heedeuk Shin, Sandia National Labs. (United States)
Hui Dong, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 8636:
Advances in Slow and Fast Light VI
Selim M. Shahriar; Frank A. Narducci, Editor(s)

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