Patent ID: 11940560
Assignee: HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN)
Field: Optics (Instruments)
Classification: CPC G | IPC G  H

Claim 0:
1. An ultra-long subwavelength grating as the optical antenna for optical phased arrays, comprising a top structure and a bottom structure which are vertically stacked,
wherein a refractive index of the bottom structure is lower than a refractive index of the top structure,
wherein a strip waveguide is formed in a middle of the top structure, and subwavelength blocks are disposed in the top structure with a gap between edges of the strip waveguide and edges of the subwavelength blocks and with periodicity on two sides of the strip waveguide and the periodicity of the subwavelength blocks are arrayed in a direction along the strip waveguide to form the grating structure.