Routing valley exciton emission of a WS<sub>2</sub> monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs

Jiajun Wang; Han Li; Yating Ma; Maoxiong Zhao; Wenzhe Liu; Bo Wang; Shiwei Wu; Xiaohan Liu; Lei Shi; Tian Jiang; Jian Zi

doi:10.1038/s41377-020-00387-4

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Routing valley exciton emission of a WS₂ monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs

Original Articles

- Routing valley exciton emission of a WS₂ monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs
- Light: Science & Applications Vol. 9, Issue 5, Pages: 1446-1453(2020)
- Affiliations：
  
  1.State Key Laboratory of Surface Physics, Key Laboratory of Micro- and Nano- Photonics Structures (Ministry of Education) and Department of Physics, Fudan University, 200433 Shanghai, China
  2.College of Advanced Interdisciplinary Studies, National University of Defense Technology, 410073 Changsha, China
  3.Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093 Nanjing, China
- Author bio：
  
  Lei Shi (lshi@fudan.edu.cn)
  Tian Jiang (tjiang@nudt.edu.cn)
  Jian Zi (jzi@fudan.edu.cn)
- Funds：
- DOI：10.1038/s41377-020-00387-4
  CLC：
- Published：2020，
  
  Published Online：21 August 2020，
  
  Received：02 June 2020，
  
  Revised：03 August 2020，
  
  Accepted：11 August 2020
- Accepted：
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Wang, J. J. et al. Routing valley exciton emission of a WS₂ monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs. Light: Science & Applications, 9, 1446-1453 (2020).
DOI：

Wang, J. J. et al. Routing valley exciton emission of a WS₂ monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs. Light: Science & Applications, 9, 1446-1453 (2020). DOI： 10.1038/s41377-020-00387-4.

摘要

Abstract

The valleys of two-dimensional transition metal dichalcogenides (TMDCs) offer a new degree of freedom for information processing. To take advantage of this valley degree of freedom

on the one hand

it is feasible to control valleys by utilizing different external stimuli

such as optical and electric fields. On the other hand

nanostructures are also used to separate the valleys by near-field coupling. However

for both of the above methods

either the required low-temperature environment or low degree of coherence properties limit their further applications. Here

we demonstrate that all-dielectric p

hotonic crystal (PhC) slabs without in-plane inversion symmetry (C

symmetry) can separate and route valley exciton emission of a WS

monolayer at room temperature. Coupling with circularly polarized photonic Bloch modes of such PhC slabs

valley photons emitted by a WS

monolayer are routed directionally and are efficiently separated in the far field. In addition

far-field emissions are directionally enhanced and have long-distance spatial coherence properties.

关键词

Keywords

references

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Routing valley exciton emission of a WS2 monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs

DOI：10.1038/s41377-020-00387-4

摘要

Abstract

关键词

Keywords

references

Routing valley exciton emission of a WS₂ monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs