公开(公告)号：US20220382120A1

公开(公告)日：2022-12-01

申请号：US17330274

申请日：2021-05-25

Applicant: Apple Inc.

Inventor： Jiayu Li ,  Dawei Lu

IPC: G02F1/23 ,  H01L31/0232 ,  H01L33/58 ,  G01J1/04 ,  G01J1/42 ,  G02F1/01

Abstract: An optical device stack includes at least one of a photodetector or an optical emitter and a metasurface. The metasurface is disposed over a light-receiving surface of the photodetector or a light emission surface of the optical emitter. The metasurface includes a first conductive layer having an electrically-tunable optical property and an array of conductive nanostructures disposed on a first side of the first conductive layer. A second conductive layer is disposed on a second side of the first conductive layer. An electrical insulator is disposed between the first conductive layer and the second conductive layer. A change in an electrical bias between the metasurface and the second conductive layer, from a first electrical bias to a second electrical bias, tunes the electrically-tunable optical property from a first state to a second state, and changes an electrically-tunable optical filtering property of the metasurface.