Ultra-broadband on-chip beam focusing enabled by GRIN metalens on silicon-on-insulator platform.

ABSTRACT: Metalens has emerged as an important optical block in free-space optical systems, which shows excellent performance. Even the metalens based on gradient index (GRIN) profiles can be implemented for on-chip beam focusing behavior. However, for most previous schemes, the GRIN metalenses can only achieve on-chip beam focusing behavior in one dimension, which limits their applications in low-loss waveguide interconnecting or fiber-to-chip coupling. In this paper, an on-chip half Maxwell's fisheye lens based on GRIN profiles with subwavelength features, integrated with silicon waveguides, is experimentally demonstrated. Benefitting from the index distribution and beam focusing characteristics of the half Maxwell's fisheye lens, an on-chip beam transforming can be achieved for transverse electri

SUBMITTER: Shen J 

PROVIDER: S-EPMC11501878 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature