Coupling between even- and oddlike modes in a single asymmetric photonic crystal waveguide

Mao, Xiaoyu; Huang, Yidong; Zhang, Wei; Peng, Jiangde
November 2009
Applied Physics Letters;11/2/2009, Vol. 95 Issue 18, p183106
Academic Journal
The photonic crystal (PC) is an important structure for realizing optical integrative circuits. Nowadays, most PC based passive devices operate by utilizing the coupling either between several PC waveguides or between PC waveguides and resonance cavities. In this letter, we present a coupling mechanism between even- and oddlike modes in a single asymmetric PC waveguide. Switches based on this coupling phenomenon were validated experimentally. By adjusting the temperature controlled by the thermal resistor, an extinction ratio of 9.1 dB was realized. Our researches provide a potential way of not only guiding but also controlling light in a simple single PC waveguide.


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