Subwavelength structured silicon waveguides and photonic devices

Nanophotonics

article

Lu Sun¹  Yong Zhang¹  Yu He¹  Hongwei Wang¹  Yikai Su¹ 

[1] State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University

关键词: subwavelength structure;    silicon photonics;    metamaterial;    polarization handling;    mode multiplexing;    optical interconnect;   

DOI  :  10.1515/nanoph-2020-0070

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Subwavelength structures such as subwavelength gratings (SWGs) and subwavelength metamaterials are capable of tailoring the optical properties of materials and controlling the flow of light at the nanoscale. The effective indices of the subwavelength structured strip and slab waveguides can be changed in a wide range by choosing an appropriate duty cycle or a filling factor of silicon, which provides an effective method to manipulate the optical field and achieve effective index matching for functional devices. Recent advances in nanofabrication techniques have made it possible to implement subwavelength structures in silicon strip and slab waveguides. Here we review various approaches used to design subwavelength structures and achieve exotic optical responses and discuss how these structures can be used to realize high-performance silicon photonic devices. Both one-dimensional SWG devices and two-dimensional subwavelength metamaterial devices are covered in this review, including subwavelength structure–based polarization handling devices, mode manipulation devices, and building blocks for integrated optical interconnects. Perspectives on subwavelength structured silicon photonic devices are also discussed.

【 授权许可】

CC BY