Lundt, N. and Nagler, P. and Nalitov, A. and Klembt, S. and Wurdack, M. and Stoll, S. and Harder, T. H. and Betzold, S. and Baumann, V. and Kavokin, A. V. and Schueller, C. and Korn, T. and Hoefling, S. and Schneider, C. (2017) Valley polarized relaxation and upconversion luminescence from Tamm-plasmon trion-polaritons with a MoSe2 monolayer. 2D MATERIALS, 4 (2): 025096. ISSN 2053-1583,
Full text not available from this repository. (Request a copy)Abstract
Transition metal dichalcogenides represent an ideal testbed to study excitonic effects, spin-related phenomena and fundamental light-matter coupling in nanoscopic condensed matter systems. In particular, the valley degree of freedom, which is unique to such direct band gap monolayers with broken inversion symmetry, adds fundamental interest in these materials. Here, we implement a Tamm-plasmon structure with an embedded MoSe2 monolayer and study the formation of polaritonic quasi-particles. Strong coupling conditions between the Tamm-mode and the trion resonance of MoSe2 are established, yielding bright luminescence from the polaritonic ground state under non-resonant optical excitation. We demonstrate, that tailoring the electrodynamic environment of the monolayer results in a significantly increased valley polarization. This enhancement can be related to change in recombination dynamics shown in time-resolved photoluminescence measurements. We furthermore observe strong upconversion luminescence from resonantly excited polariton states in the lower polariton branch. This upconverted polariton luminescence is shown to preserve the valley polarization of the trion-polariton, which paves the way towards combining spin-valley physics and exciton scattering experiments.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSITION-METAL DICHALCOGENIDES; EXCITON-POLARITONS; SEMICONDUCTOR; WS2; SPIN; OPTOELECTRONICS; MICROCAVITIES; BOTTLENECK; PHOTONICS; DYNAMICS; transition metal dichalcogenide; MoSe2; trion; polariton; strong coupling; upconversion |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:10 |
| Last Modified: | 28 Feb 2019 10:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/836 |
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