Year: 2023
Type: article
Abstract: Single-photon sources are in high demand for quantum information applications. A paradigmatic way to achieve single-photon emission is through anharmonicity in the energy levels, such that the absorption of a single photon from a coherent drive shifts the system out of resonance and prevents absorption of a second one. We identify a novel mechanism for single-photon emission through non-Hermitian anharmonicity, i.e., anharmonicity in the losses instead of in the energy levels. We demonstrate the mechanism in two types of systems, including a feasible setup consisting of a hybrid metallodielectric cavity weakly coupled to a two-level emitter, and show that it induces high-purity single-photon emission at high repetition rates.
Source: Physical Review Letters
Institution: Universidad Autónoma de Madrid
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1083870066, G1288190728, The CIVIS Alliance Programme for International, Interdisciplinary, Intersectoral Research and Training for Experienced Researchers, G183705201, G2555171554, G3273345330, G3854163330, G4886340113, G6021978079, G6681352855, MID-INFRARED QUANTUM TECHNOLOGY FOR SENSING, G7189216031, G796698703
OpenAlex ID: W4380879859