All-dielectric antislot waveguide with subwavelength mode confinement and its high-efficiency coupling with input/output fiber
Received:November 18, 2020  Revised:June 28, 2021  download
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Author NameAffiliationPostcode
YUE Wen-Cheng Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences 200050
WANG Qing Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
University of Chinese Academy of Sciences 
LI Xin-Yu Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
Xi’an University of Technology 
WANG Shu-Xiao Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
University of Chinese Academy of Sciences 
YU Ming-Bin Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
Shanghai Industrial μTechnology Research Institute 
Abstract:The realization of subwavelength mode confinement is mainly based on surface plasmon polaritons. Due to metallic ohmic loss, plasmonic waveguides usually have larger propagation loss. Here, an all-dielectric antislot waveguide was proposed, which can realize subwavelength mode confinement and theoretically lossless propagation simultaneously. A normalized mode area of 0.034 was achieved in the all-dielectric antislot waveguide. Moreover, an efficient coupling scheme between the small-size antislot waveguide and input/output fiber was proposed. An overall coupling efficiency of 92.7% was attained. The misalignment tolerance for 1 dB loss penalty was about 2 μm in both y and z directions.
keywords:photonic integrated circuits, nanophotonics, waveguide
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《Journal of Infrared And Millimeter Waves》