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22 February 2012 Single-mode silicon-on-insulator elliptical microdisk resonators with high Q factors
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We propose and demonstrate a novel elliptical microdisk resonator which enables single-mode operation with high quality (Q) factor. Such elliptical microdisk resonators with pedestal, which consist of plenty of smoothly changing bends with modified curvature radii, can easily achieve single-mode operation due to selective losses introduced by mode transmission mismatches and small curvature radii portion inside the elliptical microdisks. We fabricated the devices on silicon-on-insulator (SOI) platform. Single-mode resonance with high quality factor (Q) of ~105 was experimentally realized. Besides, the proposed elliptical microdisk provides larger coupling strength compared to normal circular microdisk, and hence enables critical coupling with easy-to-fabricate gaps.
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Kang Xiong, Xi Xiao, Yingtao Hu, Zhiyong Li, Tao Chu, Yude Yu, and Jinzhong Yu "Single-mode silicon-on-insulator elliptical microdisk resonators with high Q factors", Proc. SPIE 8333, Photonics and Optoelectronics Meetings (POEM) 2011: Optoelectronic Devices and Integration, 83330A (22 February 2012);

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