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Chin. Phys. B, 2019, Vol. 28(9): 094215    DOI: 10.1088/1674-1056/ab38a3
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Properties of metal-insulator-metal waveguide loop reflector

Hu Long(龙虎)1,2, Xuan-Ke Zeng(曾选科)1, Yi Cai(蔡懿)1, Xiao-Wei Lu(陆小微)1, Hong-Yi Chen(陈红艺)1, Shi-Xiang Xu(徐世祥)1, Jing-Zhen Li(李景镇)1
1 Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China;
2 Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Abstract  

A new type and easy-to-fabricate metal-insulator-metal (MIM) waveguide reflector based on Sagnac loop is designed and investigated. The transfer matrix theoretical model for the transmission of electric fields in the reflector is established, and the properties of the reflector are studied and analyzed. The simulation results indicate that the reflectivity strongly depends on the coupling splitting ratio determined by the coupling length. Accordingly, different reflectivities can be realized by varying the coupling length. For an optimum coupling length of 750 nm, the 3-dB reflection bandwidth of the MIM waveguide reflector is as wide as 1.5 μm at a wavelength of 1550 nm, and the peak reflectivity and isolation are 78% and 23 dB, respectively.

Keywords:  surface plasmon polaritons      waveguide      reflector     
Received:  08 April 2019      Published:  05 September 2019
PACS:  42.82.-m (Integrated optics)  
  42.82.Et (Waveguides, couplers, and arrays)  
  42.79.Fm (Reflectors, beam splitters, and deflectors)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant Nos. 61827815 and 61775142).

Corresponding Authors:  Jing-Zhen Li     E-mail:  lijz@szu.edu.cn

Cite this article: 

Hu Long(龙虎), Xuan-Ke Zeng(曾选科), Yi Cai(蔡懿), Xiao-Wei Lu(陆小微), Hong-Yi Chen(陈红艺), Shi-Xiang Xu(徐世祥), Jing-Zhen Li(李景镇) Properties of metal-insulator-metal waveguide loop reflector 2019 Chin. Phys. B 28 094215

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