All-dielectric antislot waveguide with subwavelength mode confinement and its high-efficiency coupling with input/output fiber [具有亚波长模式局域性的全介质反槽波导及其与输入/输出光纤的高效耦合]

作者：Yue W.-C.^*; Wang Q.; Li X.-Y.; Wang S.-X.; Yu M.-B.

来源：Journal of Infrared and Millimeter Waves, 2021, 40(6): 709-714.

DOI：10.11972/j.issn.1001-9014.2021.06.001

• Nanophotonics
• Photonic integrated circuits
• Waveguide

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 3.4×10-2 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.

• 单位
  中国科学院大学