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Proceedings Paper

Self-alignment and instability of waveguides induced by forces of guided and radiated fields
Author(s): Amit Mizrahi; Kazuhiro Ikeda; Fabio Bonomelli; Vitaliy Lomakin; Yeshaiahu Fainman
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Paper Abstract

We discuss a new effect of optical forces, namely, the self-alignment or instability of two parts of a waveguide broken by an offset and a gap. Using a mode matching technique, we investigate the case where there is no gap and only an offset. It is shown that for a TE incident mode, self-alignment occurs for small values of the waveguide thickness, whereas for large values, the system is unstable. For a TM incident mode, however, the situation is reversed and the two parts tend to self-align for large values of the waveguide thickness. It is also shown that the forces are due to the presence of both radiation modes, generated by the discontinuity, and the guided mode. For a TM incident mode, polarization surface charges are formed, that may cause strong self-alignment forces in both the transverse and longitudinal directions.

Paper Details

Date Published: 16 February 2010
PDF: 8 pages
Proc. SPIE 7606, Silicon Photonics V, 76060L (16 February 2010); doi: 10.1117/12.842610
Show Author Affiliations
Amit Mizrahi, Univ. of California, San Diego (United States)
Kazuhiro Ikeda, Univ. of California, San Diego (United States)
Fabio Bonomelli, Univ. of California, San Diego (United States)
Vitaliy Lomakin, Univ. of California, San Diego (United States)
Yeshaiahu Fainman, Univ. of California, San Diego (United States)

Published in SPIE Proceedings Vol. 7606:
Silicon Photonics V
Joel A. Kubby; Graham T. Reed, Editor(s)

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