Infrared Interlayer Exciton Emission in MoS2/WSe2 Heterostructures
We report light emission around 1 eV (1240 nm) from heterostructures of MoS2 and WSe2 transition metal dichalcogenide monolayers. We identify its origin in an interlayer exciton (ILX) by its wide spectral tunability under an out-of-plane electric field. From the static dipole moment of the state, it...
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| Veröffentlicht in: | Physical review letters 2019-12, Vol.123 (24), p.1 |
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| creator | Karni, Ouri Barré, Elyse Lau, Sze Cheung Gillen, Roland Ma, Eric Yue Kim, Bumho Watanabe, Kenji Taniguchi, Takashi Maultzsch, Janina Barmak, Katayun Page, Ralph H Heinz, Tony F |
| description | We report light emission around 1 eV (1240 nm) from heterostructures of MoS2 and WSe2 transition metal dichalcogenide monolayers. We identify its origin in an interlayer exciton (ILX) by its wide spectral tunability under an out-of-plane electric field. From the static dipole moment of the state, its temperature and twist-angle dependence, and comparison with electronic structure calculations, we assign this ILX to the fundamental interlayer transition between the K valleys in this system. Our findings gain access to the interlayer physics of the intrinsically incommensurate MoS2/WSe2 heterostructure, including moiré and valley pseudospin effects, and its integration with silicon photonics and optical fiber communication systems operating at wavelengths longer than 1150 nm. |
| doi_str_mv | 10.1103/PhysRevLett.123.247402 |
| format | Article |
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We identify its origin in an interlayer exciton (ILX) by its wide spectral tunability under an out-of-plane electric field. From the static dipole moment of the state, its temperature and twist-angle dependence, and comparison with electronic structure calculations, we assign this ILX to the fundamental interlayer transition between the K valleys in this system. 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| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Communications systems CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Dipole moments Electric fields Electronic structure Excitons Heterostructures Interlayers Light emission Molybdenum disulfide Optical communication Optical fibers Photonics Temperature dependence Transition metal compounds |
| title | Infrared Interlayer Exciton Emission in MoS2/WSe2 Heterostructures |
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