Valley polarized relaxation and upconversion luminescence from Tamm-Plasmon Trion-Polaritons with a MoSe2 monolayer
arXiv:1705.04464 · doi:10.1088/2053-1583/aa6ef2
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.
arXiv comment15 pages, 4 figures
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Cited by in corpus (16)
- Two-dimensional semiconductors in the regime of strong light-matter coupling
- A Room Temperature Polariton Light-Emitting Diode Based on Monolayer WS2
- Optical valley Hall effect for highly valley-coherent exciton-polaritons in an atomically thin semiconductor
- Valley coherent exciton-polaritons in a monolayer semiconductor
- Exciton optics, dynamics and transport in atomically thin semiconductors
- Roadmap for Photonics with 2D Materials
- Observation of bosonic condensation in a hybrid monolayer MoSe2-GaAs microcavity
- Observation of macroscopic valley-polarized monolayer exciton-polaritons at room temperature
- Valley polarization of exciton-polaritons in monolayer WSe2 in a tunable microcavity
- Magnetic field induced splitting and polarization of monolayer-based valley exciton-polaritons
- Exciton-Plasmon Coupling in 2D Semiconductors by Surface Acoustic Waves
- Long-lived spin polarization in n-doped MoSe monolayers
- Effect of fermion indistinguishability on optical absorption of doped two-dimensional semiconductors
- Circumventing the polariton bottleneck via dark excitons in 2D semiconductors
- Strong Coupling of Collection of Emitters on Hyperbolic Meta-Material
- Fabrication of high-quality PMMA/SiO spaced planar microcavities for strong coupling of light with monolayer WS excitons