Multiobjective Inverse Design of Solid-State Quantum Emitter Single-Photon Sources

Autor(es)

Melo, Emerson G. ; Eshbaugh, William ; Flagg, Edward B. ; Davanco, Marcelo

• Tipo de documento: Artigo Científico
• Fonte: ACS PHOTONICS; v. N/A, p. 9-pg., 2022-09-19.

Resumo

Single solid-state quantum emitters offer consid-erable potential for the implementation of sources of single indistinguishable photons, which are central to many photonic quantum information systems. Nanophotonic geometry optimiza-tion with multiple performance metrics is imperative to convert a bare quantum emitter into a single-photon source that approaches the necessary levels of purity, indistinguishability, and brightness for quantum photonics. We present an inverse design methodology that simultaneously targets two important figures-of-merit for high -performance quantum light sources: the Purcell radiative rate enhancement and the coupling efficiency into a desired light collection channel. We explicitly address geometry-dependent power emission, a critical but often overlooked aspect of gradient-based optimization of quantum emitter single-photon sources. We illustrate the efficacy of our method through the design of a single-photon source based on a quantum emitter in a GaAs nanophotonic structure that provides a Purcell factor Fp = 21 with a 94% waveguide coupling efficiency, while respecting a geometric constraint to minimize emitter decoherence caused by etched sidewalls. Our results indicate that multiobjective inverse design can yield competitive performance with more favorable trade-offs than conventional approaches based on a pre-established waveguide or cavity geometries. (AU)

• Processo FAPESP: 21/10249-2 - Fonte de fótons únicos em circuitos fotônicos integrados multimodais de GaAs com excitação ressonante
• Beneficiário: Emerson Gonçalves de Melo
• Modalidade de apoio: Bolsas no Exterior - Pesquisa