Resonance-splitting and enhanced notch depth in SOI ring resonators with mutual mode coupling
Resonance-splitting and enhanced notch depth in SOI ring resonators with mutual mode coupling
复制标题
DOI：
10.1364/oe.16.004621
复制
发表时间：
2008-03-31
期刊：
影响因子：
3.8
通讯作者：
Qiu, Min
中科院分区：
文献类型：
--
作者：
Zhang, Ziyang;Dainese, Matteo;Qiu, Min
在SOI平台上的微环谐振器中，由于互模耦合，实验证明了谐振分裂和增强的陷波深度。这种耦合可以通过沿着环侧壁的纳米级光栅或通过两个同心环之间的倏逝定向耦合来产生。利用时域耦合模分析法拟合了透射谱。5 μ m半径环的分波长分离为0.68 nm，10 μ m半径环的陷波深度为40 dB，20 μ m半径环的固有Q因子为2.6 × 10（5）。在半径为40-39 μ m的双环结构中，缺口深度改善大于25 dB。增强的凹口深度和增加的模态面积的同心环可能是有前途的生物传感应用的优势。(c)2008年美国光学学会。
Resonance-splitting and enhanced notch depth are experimentally demonstrated in micro-ring resonators on SOI platform as a result of the mutual mode coupling. This coupling can be generated either by the nanometer-scaled gratings along the ring sidewalls or by evanescent directional coupling between two concentric rings. The transmission spectra are fitted using the time-domain coupled mode analysis. Split-wavelength separation of 0.68 nm for the 5-mu m-radius ring, notch depth of 40 dB for the 10-mu m-radius ring, and intrinsic Q factor of 2.6 x 10(5) for the 20-mu m-radius ring are demonstrated. Notch depth improvement larger than 25dB has been reached in the 40-39-mu m-radius double-ring structure. The enhanced notch depth and increased modal area for the concentric rings might be promising advantages for bio-sensing applications. (c) 2008 Optical Society of America.