Reconfigurable All Dielectric Metasurfaces based on Optical Phase Change Materials: Design Approaches
Abstract
Optical metasurface is a recently emerged paradigm for controlling light propagation, which enables implementation of ultra-compact optical devices with extended functionalities. Nowadays the main challenge in the field is to realize active metasurfaces with high quality, high efficiency, and large tuning range. Here we present a design approach for constructing a two-state reconfigurable metalens made of low-loss optical phase-change material (O-PCM). The metalens design is capable to produce diffraction limited focusing, large change in focal length (from 1.5 mm to 2mm), and decent focusing efficiency of about 20% in both states. The proposed design methodology is generic and can be easily extended towards constructing metasurfaces, which can switch between two or more arbitrary phase maps.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 05, 2020
- Source ID
- 10.47037/2020.aces.j.351191
Entities
People
- Clayton Fowler
- Fan Yang
- Hualiang Zhang
- Juejun Hu
- Mikhail Y Shalaginov
- Sensong An
- Tian Gu
- Yifei Zhang
Organizations
- Defense Advanced Research Projects Agency