High-purity and stable single-photon emission in bilayer WSe₂ via phonon-assisted excitation.

ABSTRACT: The excitation scheme is essential for single-photon sources, as it governs exciton preparation, decay dynamics, and the spectral diffusion of emitted photons. While phonon-assisted excitation has shown promise in other quantum emitter platforms, its proper implementation and systematic comparison with alternative excitation schemes have not yet been demonstrated in transition metal dichalcogenide (TMD) quantum emitters. Here, we investigate the impact of various optical excitation strategies on the single-photon emission properties of bilayer WSe₂ quantum emitters. Based on our theoretical predictions for the exciton preparation fidelity, we compare the excitation via the longitudinal acoustic and breathing phonon modes to conventional above-band and near-resonance excitations.

SUBMITTER: Piccinini C 

PROVIDER: S-EPMC11996677 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature