6 March 2013 Slow light through tightly coupled light waves and acoustic waves in nanoscale waveguides
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Proceedings Volume 8636, Advances in Slow and Fast Light VI; 863607 (2013) https://doi.org/10.1117/12.2010049
Event: SPIE OPTO, 2013, San Francisco, California, United States
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.
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Zheng Wang, Zheng Wang, Wenjun Qiu, Wenjun Qiu, Peter Rakich, Peter Rakich, Heedeuk Shin, Heedeuk Shin, Hui Dong, Hui Dong, } "Slow light through tightly coupled light waves and acoustic waves in nanoscale waveguides", Proc. SPIE 8636, Advances in Slow and Fast Light VI, 863607 (6 March 2013); doi: 10.1117/12.2010049; https://doi.org/10.1117/12.2010049
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