Focusing and defocusing switching of an indium selenide-silicon photonic metalens
Abstract
With a fixed geometric design, homogeneous change of Indium Selenide ( I n 2 S e 3 ) switches the focusing length of a silicon photonic metalens between positive and negative values. This unique functionality of the hybrid metasurface is attributed to the fact that the silicon’s refractive index is in the middle of the two convertible states in the optical phase change material. The infrared transparency of I n 2 S e 3 in both states enables near phase-only metasurface structures. The design is foundry compatible and feasible for implementing nonvolatile adaptive transformation optic systems on-chip.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 18, 2021
- Source ID
- 10.1364/ol.427386
Entities
People
- Boshu Sun
- Linjie Zhou
- Ningning Wang
- Tiantian Li
- Tingyi Gu
- Zi Wang
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- National Natural Science Foundation of China
- Shanghai Jiao Tong University
- University of Delaware