诺共振
光学
插入损耗
光开关
材料科学
光电子学
等离子体子
物理
作者
Zhengxing Cheng,Jianji Dong,Chi Zhang
出处
期刊:Optics Letters
[The Optical Society]
日期:2020-04-14
卷期号:45 (8): 2363-2363
被引量:17
摘要
We propose and theoretically analyze a generalized four-port waveguide-cavity system with a novel, to the best of our knowledge, semisymmetric Fano structure. By applying the system to a silicon-based photonic crystal nanobeam cavity (PCNC), we experimentally demonstrate an ultracompact crossbar optical switch with high drop port transmission. A low insertion loss of 1.5 dB in the drop port at the cross state is achieved comparing to the 8.5 dB insertion loss in a traditional non-Fano structure. The device is also benefited by the high quality factor and small mode volume for efficient switching and the ultracompact footprint of 14 µ m 2 in the core structure. The proposed PCNC switch shows great potential in various optical systems on chip to increase the integration and reduce energy consumption.
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