Generation of helical topological exciton-polaritons
Abstract
The ability to design and fabricate optical systems with tunable topological features makes them especially attractive for developing analogs of topological condensed matter systems, which by themselves tend to be fixed or limited in their tunability. Liu et al. now show that the combination of a two-dimensional material with a photonic crystal can be used to develop an analogous quantum spin Hall system. The strong coupling between the monolayer tungsten disulfide excitons with a nontrivial hexagonal photonic crystal gives rise to helical topological polaritons observed at up to 200 kelvin. The topological polaritons can be actively tuned by temperature and may further be manipulated with electric or magnetic fields, thereby providing a flexible platform with which to explore exotic topological phenomena and new phases of quantum matter.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 30, 2020
- Source ID
- 10.1126/science.abc4975
Entities
People
- Anlian Pan
- Biyuan Zheng
- Gaurav Modi
- Min-Soo Hwang
- Ritesh Agarwal
- Volker Sorger
- Wenjing Liu
- Yuhui Wang
- Zhurun Ji
Organizations
- Army Research Office
- George Washington University
- Hunan University
- National Natural Science Foundation of China
- National Science Foundation Office of the Director
- Office of Naval Research
- University of Pennsylvania