Plasmon-Mediated Coherent Superposition of Discrete Excitons under Strong Exciton–Plasmon Coupling in Few-Layer MoS2 at Room Temperature
[1];
[2];
[2];
[4]
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Boston College, Chestnut Hill, MA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Boston College, Chestnut Hill, MA (United States); Vassar College, Poughkeepsie, NY (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
In this paper, we demonstrate room temperature coherent hybridization of the A- and B-excitons in few-layer MoS2, mediated by simultaneous strong coupling to surface plasmon polaritons. Few-layer MoS2 was placed on a tunable plasmonic structure and the system’s dispersion was measured by tuning the plasmon energy across the exciton energies. Strong coupling was observed as double Rabi splitting at the A- and B-excitons of 81 and 93 meV, respectively. A coupled harmonic oscillator model sheds light on the nature of the interaction, revealing a quantum superposition of the A- and B-excitons, mediated by the plasmon interaction. This observation suggests the possibility of room temperature intra- or intervalley quantum information transport and/or spin entanglement. The experiment confirms a previous theoretical prediction of room temperature exciton–exciton hybridization in two-dimensional MoS2. Further, through modeling we find that room temperature strong coupling is a general phenomenon among two-dimensional transition metal dichalcogenide exciton–plasmon systems.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1659931
- Report Number(s):
- NREL/JA-5900-74742; MainId:6071; UUID:2923dd5c-dfc9-e911-9c26-ac162d87dfe5; MainAdminID:13657
- Journal Information:
- ACS Photonics, Vol. 7, Issue 5; ISSN 2330-4022
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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