標題: Design of photonic directional couplers as phase selectors
作者: Lee, Po-Yi
Huang, Chih-Hsien
Hsieh, Wen-Feng
光電工程學系
Department of Photonics
公開日期: 1-Jun-2013
摘要: A phase selector is designed by relatively sliding two coupled identical photonic crystal waveguides (PCWs) of a photonic directional coupler (DC). By solving the coupled equations analytically derived from the tight-binding theory, symmetry breaking in the crossing of dispersion curves can be observed as countersliding two degenerated waveguides along the propagation direction. There exists a different phase shift between two eigenmodes by varying the sliding distance and the operating frequency. Numerical simulations of DCs made of photonic crystal slabs were used to verify the correctness of our theoretical predictions and to discuss thoroughly the underlying physics of the symmetry-breaking system. The design concept is provided for a phase selector or a beam splitter whose output phase difference can be controlled by the sliding distance of two PCWs. (C) 2013 Optical Society of America
URI: http://dx.doi.org/10.1364/JOSAB.30.001631
http://hdl.handle.net/11536/22350
ISSN: 0740-3224
DOI: 10.1364/JOSAB.30.001631
期刊: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume: 30
Issue: 6
起始頁: 1631
結束頁: 1636
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