Gradient index plasmonic ring resonator with high extinction ratio

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• 作者：Zidong Zhou ; Pengbin He ; Jinyou Xu ; Xiujuan Zhuang ; Yunyun Li ; Anlian Pan
• 关键词：Surface plasmon polaritons ; Optical resonators ; Integrated optics ; Finite element method
• 刊名：Optics Communications
• 出版年：1 February, 2014
• 年：2014
• 卷：312
• 期：Complete
• 页码：280-283
• 全文大小：1683 K

文摘

We propose and investigate a compact gradient index plasmonic ring resonator (Grin PRR) with strong light confinement and extinction ratio based on finite element method (FEM). Theoretical simulation reveals that the change of index gradient influences the resonant frequency, Q factor and the mode volume. Significantly, it is demonstrated that the extinction ratio of Grin PRR can be optimized by varying the index gradient for any radius. Index gradient can enhance extinction ratio at settled size, so this structure has both high extinction ratio and smaller size footprint. It could be very promising for the high-density optical integration.