Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas

doi:10.1088/1674-1056/27/9/094217

中国物理B ›› 2018, Vol. 27 ›› Issue (9): 94217-094217.doi: 10.1088/1674-1056/27/9/094217

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas

Jingfeng Tan(谭敬丰), Hua Pang(庞画), Fengkai Meng(孟凤凯), Jin Jiang(蒋进)

State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China

收稿日期:2018-04-19 修回日期:2018-06-07 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: Jingfeng Tan E-mail:jftan@pku.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0205700 and 2015CB932403) and the National Natural Science Foundation of China (Grant Nos. 11174062, 51472057, and 21790364).

Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas

Jingfeng Tan(谭敬丰), Hua Pang(庞画), Fengkai Meng(孟凤凯), Jin Jiang(蒋进)

State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China

Received:2018-04-19 Revised:2018-06-07 Online:2018-09-05 Published:2018-09-05
Contact: Jingfeng Tan E-mail:jftan@pku.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0205700 and 2015CB932403) and the National Natural Science Foundation of China (Grant Nos. 11174062, 51472057, and 21790364).

摘要/Abstract

摘要：

Wavelength demultiplexing waveguide couplers have important applications in integrated nanophotonic devices. Two of the most important indicators of the quality of a wavelength demultiplexing coupler are coupling efficiency and splitting ratio. In this study, we utilize two asymmetric high-index dielectric nanoantennas directly positioned on top of a silicon-on insulator waveguide to realize a compact wavelength demultiplexing coupler in a communication band, which is based on the interference of the waveguide modes coupled by the two nanoantennas. We add a Au substrate for further increasing the coupling efficiency. This has constructive and destructive influences on the antenna's in-coupling efficiency owing to the Fabry-Perot (FP) resonance in the SiO₂ layer. Therefore, we can realize a wavelength demultiplexing coupler with compact size and high coupling efficiency. This coupler has widespread applications in the areas of wavelength filters, on-chip signal processing, and integrated nanophotonic circuits.

关键词: wavelength demultiplexing coupler, high-index dielectric nanoantenna, coupling efficiency, Fabry-Perot (FP) resonance

Abstract:

Key words: wavelength demultiplexing coupler, high-index dielectric nanoantenna, coupling efficiency, Fabry-Perot (FP) resonance

中图分类号: (Optical communication systems, multiplexers, and demultiplexers?)

42.79.Sz

42.82.Et (Waveguides, couplers, and arrays) 42.82.-m (Integrated optics)

谭敬丰, 庞画, 孟凤凯, 蒋进. Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas[J]. 中国物理B, 2018, 27(9): 94217-094217.

Jingfeng Tan(谭敬丰), Hua Pang(庞画), Fengkai Meng(孟凤凯), Jin Jiang(蒋进). Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas[J]. Chin. Phys. B, 2018, 27(9): 94217-094217.

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Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas

Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas

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