Year: 2024
Type: article
Abstract: Bose polarons are mobile particles of one kind dressed by excitations of the surrounding degenerate Bose gas of particles of another kind. These many-body objects have been realized in ultracold atomic gases and become a subject of intensive studies. In this work, we show that excitons in electron-hole bilayers offer new opportunities for exploring polarons in strongly interacting, highly tunable bosonic systems. We found that Bose polarons are formed by spatially direct excitons immersed in degenerate Bose gases of spatially indirect excitons (IXs). We detected both attractive and repulsive Bose polarons by measuring photoluminescence excitation spectra. We controlled the density of IX Bose gas by optical excitation and observed an enhancement of the energy splitting between attractive and repulsive Bose polarons with increasing IX density, in agreement with our theoretical calculations.
Source: Nano Letters
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1746067696, Supplying the Quantum Materials Community with Record-Mobility Gallium Arsenide Quantum Wells, G222768804, COLD EXCITON GASES IN SEMICONDUCTOR HETEROSTRUCTURES, G344929892, G4535154840, COLD EXCITON GASES IN SEMICONDUCTOR HETEROSTRUCTURES, G6536552022, Princeton Center for Complex Materials, Indirect Excitons
OpenAlex ID: W4403396090