Phonon Sidebands in Transition Metal Dichalcogenides

Abstract

Excitons dominate the optical properties of monolayer transition metal dichalcogenides (TMDs). Besides optically accessible bright exciton states, TMDs exhibit also a multitude of optically forbidden dark excitons. Here, we show that efficient exciton-phonon scattering couples bright and dark states and gives rise to an asymmetric excitonic line shape. The observed asymmetry can be traced back to phonon-induced sidebands that are accompanied by a polaron redshift. We present a joint theory-experiment study investigating the microscopic origin of these sidebands in different TMD materials taking into account intra- and intervalley scattering channels opened by optical and acoustic phonons. The gained insights contribute to a better understanding of the optical fingerprint of these technologically promising nanomaterials.

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Cited by in corpus (80)

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• Control of the Exciton Radiative Lifetime in van der Waals Heterostructures
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• The ultrafast onset of exciton formation in 2D semiconductors
• Exciton diffusion in monolayer semiconductors with suppressed disorder
• Exciton Relaxation Cascade in Two-dimensional Transition-metal dichalcogenides
• Single-crystalline gold nanodisks on WS${}_2$ mono- and multilayers: Strong coupling at room temperature
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• Exciton-Scattering-Induced Dephasing in Two-Dimensional Semiconductors
• Exciton-phonon coupling in the UV absorption and emission spectra of bulk hexagonal boron nitride
• Impact of strain on the excitonic linewidth in transition metal dichalcogenides
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• Exciton optics, dynamics and transport in atomically thin semiconductors
• Theory of exciton dynamics in time-resolved ARPES: intra- and intervalley scattering in two-dimensional semiconductors
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• Exciton states in monolayer MoSe2 and MoTe2 probed by upconversion spectroscopy
• Nonclassical Exciton Diffusion in Monolayer WSe2
• Exciton-phonon coupling strength in single-layer MoSe2 at room temperature
• Phonon wind and drag of excitons in monolayer semiconductors
• Non-Markovian features in semiconductor quantum optics: Quantifying the role of phonons in experiment and theory
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• Dielectric Engineering of Electronic Correlations in a van der Waals Heterostructure
• Unconventional Excitonic States with Phonon Sidebands in Layered Silicon Diphosphide
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• Theory of optically induced Förster Coupling in van der Waals coupled Heterostuctures
• Theory of absorption lineshape in monolayers of transition metal dichalcogenides
• Microscopic picture of electron-phonon interaction in two-dimensional halide perovskites
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• Light Scattering from Solid-State Quantum Emitters: Beyond the Atomic Picture
• Larger than 80% Valley Polarization of Free Carriers in Singly-Oriented Single Layer WS${}_2$ on Au(111)
• Negative-mass exciton polaritons induced by dissipative light-matter coupling in an atomically thin semiconductor
• Quenching of Intervalley Exchange Coupling in the Presence of Momentum-Dark States in TMDCs
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• Dark-exciton based strain sensing in transition metal dichalcogenides
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• Ab initio self-trapped excitons
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• Direct Measurement of Biexcitons in Monolayer WS2
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• Strong coupling regime and hybrid quasinormal modes of a single plasmonic resonator coupled to a TMDC monolayer
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• Microscopic model of the doping dependence of line widths in monolayer transition metal dichalcogenides
• Intervalley Polaron in Atomically Thin Transition Metal Dichalcogenides
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• Interlayer exciton-polaron in atomically thin semiconductors
• Theory of coherent phonons coupled to excitons
• Excitonic theory of doping-dependent optical response in atomically thin semiconductors
• Observation of Dynamic Screening in the Excited Exciton States in Multi-layered MoS${}_2$
• Phonon-induced exciton weak localization in two-dimensional semiconductors
• Influence of direct deposition of dielectric materials on the optical response of monolayer WS${}_2$
• Theory of the Coherent Response of Magneto-Excitons and Magneto-Biexcitons in Monolayer Transition Metal Dichalcogenides
• Flexural deformations and collapse of bilayer two-dimensional crystals by interlayer exciton
• Impact of optically pumped non-equilibrium steady states on luminescence emission of atomically-thin semiconductor excitons
• Phenomenological model for long wavelength optical modes in transition-metal dichalcogenide monolayer
• Longitudinal-transverse splitting and fine structure of Fermi polarons in two-dimensional semiconductors
• Valley-exchange coupling probed by angle-resolved photoluminescence
• Simulation of emission spectra of transition-metal dichalcogenide monolayers with the multimode Brownian oscillator model
• Terahertz control of photoluminescence emission in few-layer InSe
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• Bichromatic four-wave mixing and quadrature-squeezing from biexcitons in atomically thin semiconductor microcavities
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• Phonon-mediated exciton capture in Mo-based transition metal dichalcogenides
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• Efficient quadrature-squeezing from biexcitonic parametric gain in atomically thin semiconductors