Fig. 1
From: Two-dimensional semiconductors in the regime of strong light-matter coupling
Crystal and band structure of semiconducting TMDCs. a Schematic view of TMDC monolayer crystal structure. b Band structure of TMDC monolayer with direct optical band gap at K points. c Valley-specific selection rules for molybdenum-based (MoX2 and tungsten-based (WX2)) compounds. d Evolution of exciton states for WS2 monolayer on SiO22, reproduced from Chernikov et al.2 © American Physical Society. e Optical valley initilization and valley coherence generation for a MoS2 monolayer encapsulated in hBN45 reproduced from Cadiz et al.45
