Journal
ADVANCED OPTICAL MATERIALS
Volume 9, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202101322
Keywords
intrinsic robustness; parity-time symmetry; programmable; spatiotemporal metasurfaces; spin-momentum coupling
Categories
Funding
- National Key Research and Development Program of China [2017YFA0700201, 2017YFA0700202, 2017YFA0700203]
- National Natural Science Foundation of China [61631007, 61871127, 61890544, 61801117]
- 111 Project [111-2-05]
- Fund for International Cooperation and Exchange of the National Natural Science Foundation of China [61761136007]
Ask authors/readers for more resources
A new mechanism for controlling electromagnetic wave flow based on spatiotemporal metasurface assisted with parity-time (PT) symmetric modulations is proposed and experimentally verified in the microwave regime. The generated spin-momentum coupling can be flexibly switched in real time, providing a powerful platform for exploring physical effects that are hard to realize in traditional photonic topological systems.
Topological effects have endowed brand new properties to electronic and photonic systems, including the unidirectional propagating edge states and the associated intrinsic robustness. Recent progress in topological photonics has explored novel optical effects and motivated the related photonic devices. Here, a new mechanism for controlling the electromagnetic wave flow based on spatiotemporal metasurface assisted with parity-time (PT) symmetric modulations is proposed, and a proof-in-principle experiment is conducted in the microwave regime for verification. It is shown that the spatiotemporal metasurface can provide a powerful platform for realizing robust spin-momentum coupled surface states, in which the induced effects are similar to those discovered in the topological insulators and quantum spin-Hall systems. With the aid of programmable control unit, the generated spin-momentum coupling can be flexibly switched in real time. The proposed scheme is expected to construct a novel system for controlling the evanescent light flows and facilitate the investigation of physical effects that are hard to realize in the traditional photonic topological systems.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available