Optical properties of Fermi polarons in a GaInP/MoSe2 monolayer heterostructure

Abstract

Engineering optical properties, such as luminescence purity and charge transfer, is crucial for harnessing the application potential of atomically thin transition metal dichalcogenides (TMDCs). While electrostatic gating is widely applied to gain charge control in TMDC monolayers, charge transfer can also be engineered via coupling of TMDC monolayers at semiconductor III/V, organic, or van der Waals interfaces. This confers great advantages, such as ease in implementation and compatibility in device integration. Here, we shed light on the optical properties of many-particle complexes emerging at the GaInP/MoSe2 interface as a highly relevant material combination to manipulate the optical properties of TMDCs in integrated photonic devices. Our study verifies its nature as a type II hetero-interface, which bears the feasibility to display disorder-free photoluminescence. Through optical absorption measurements, we verify that the charged complexes acquire substantial oscillator strength. Furthermore, temperature-dependent photoluminescence, supported by a microscopic theory framework, evidences the suppression of the characteristic carrier recoil effect that was previously observed in the photoluminescence of trions in TMDCs. These phenomena allow us to identify the optical signatures at the TMDC-GaInP interface as Fermi polaron quasiparticle resonances, which are of high importance in researching Bose-Fermi mixtures in condensed matter systems.

References in corpus (14)

• Two-Dimensional Material Nanophotonics
• Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
• Observation of Wigner crystal of electrons in a monolayer semiconductor
• A Microscopic Perspective on Moiré Materials
• Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas
• Optical signatures of charge order in a Mott-Wigner state
• Observation of electrically tunable Feshbach resonances in twisted bilayer semiconductors
• Giant effective Zeeman splitting in a monolayer semiconductor realized by spin-selective strong light-matter coupling
• Electron recoil effect in electrically tunable MoSe2 monolayers
• Accelerating Polaritons with External Electric and Magnetic Fields
• Substrate influence on transition metal dichalcogenide monolayer exciton absorption linewidth broadening
• Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature
• Exact Quantum Virial Expansion for the Optical Response of Doped Two-Dimensional Semiconductors
• Valley-mediated singlet- and triplet-polaron interactions and quantum dynamics in a doped WSe${}_2$ monolayer

Cited by in corpus (1)

• Room-temperature tuning and probing of Fermi polarons in atomically thin semiconductors on a plasmonic metasurface