2023/12/21 by Rigel Zifkin, César Daniel Rodríguez Rosenblueth, Zifkin, Rigel +6 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Common emitter #Condensed matter physics #Coupling (piping) #Diamond #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Germanium #Materials science #Mechanical and Optical Resonators #Optical microcavity #Optics #Optoelectronics #Physics #Quantum Physics (quant-ph) #Quantum dot #Quantum optics #Reduction (mathematics) #Silicon #Vacancy defect
paper · pdf · doi:10.48550/arxiv.2312.14313
openalex publication_date 2023/12/21 · openalex created_date 2023/12/26 · openalex updated_date 2026/08/01
Coupling between a single quantum emitter and an optical cavity presents a key capability for future quantum networking applications. Here, we explore interactions between individual germanium-vacancy (GeV) defects in diamond and an open microcavity at cryogenic temperatures. Exploiting the tunability of our microcavity system to characterize and select emitters, we observe a Purcell-effect-induced lifetime reduction of up to 4.5±0.3, and extract coherent coupling rates up to 360±20 MHz. Our results indicate that the GeV defect has favorable optical properties for cavity coupling, with a quantum efficiency of at least 0.34±0.05 and likely much higher.