1. Large Excitonic Reflectivity of MonolayerMoSe2Encapsulated in Hexagonal Boron Nitride
- Author
-
Mikhail D. Lukin, Dominik S. Wild, Luis A. Jauregui, Kristiaan De Greve, Giovanni Scuri, Kenji Watanabe, You Zhou, Philip Kim, Hongkun Park, Alexander High, Chi Shu, and Takashi Taniguchi
- Subjects
Condensed Matter::Quantum Gases ,Materials science ,Condensed Matter::Other ,business.industry ,Exciton ,Physics::Optics ,General Physics and Astronomy ,Hexagonal boron nitride ,02 engineering and technology ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,021001 nanoscience & nanotechnology ,7. Clean energy ,01 natural sciences ,Reflectivity ,Ray ,Condensed Matter::Materials Science ,Semiconductor ,Lattice (order) ,0103 physical sciences ,Monolayer ,Optoelectronics ,010306 general physics ,0210 nano-technology ,business ,Excitation - Abstract
We demonstrate that a single layer of MoSe_{2} encapsulated by hexagonal boron nitride can act as an electrically switchable mirror at cryogenic temperatures, reflecting up to 85% of incident light at the excitonic resonance. This high reflectance is a direct consequence of the excellent coherence properties of excitons in this atomically thin semiconductor. We show that the MoSe_{2} monolayer exhibits power-and wavelength-dependent nonlinearities that stem from exciton-based lattice heating in the case of continuous-wave excitation and exciton-exciton interactions when fast, pulsed laser excitation is used.
- Published
- 2018
- Full Text
- View/download PDF