Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots

Abstract

Single photon sources, which are compatible with quantum memories are an important component of quantum networks. In this article, we show optical investigations on isolated GaAs/Al${}_{0.25}$Ga${}_{0.75}$As quantum dots grown via droplet epitaxy, which emit single photons on resonance with the Rb-87-D${}_2$ line (780 nm). Under continuous wave resonant excitation conditions, we observe bright, clean and narrowband resonance fluorescence emission from such a droplet quantum dot. Furthermore, the second-order correlation measurement clearly demonstrates the single photon emission from this resonantly driven transition. Spectrally resolved resonance fluorescence of a similar quantum dot yields a linewidth as narrow as 660 MHz ($2.7\mu eV$), which corresponds to a coherence time of 0.482 ns. The observed linewidth is the smallest reported so far for strain free GaAs quantum dots grown via the droplet method. We believe that this single photon source can be a prime candidate for applications in optical quantum networks.

arXiv comment11 pages

References in corpus (21)

• Review article: Linear optical quantum computing
• Multi-photon entanglement and interferometry
• Near optimal single photon sources in the solid state
• Optical Quantum Computing
• On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar
• Quantum memory for photons: I. Dark state polaritons
• Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"
• Quantum memories: emerging applications and recent advances
• Strain-induced spatial and spectral isolation of quantum emitters in mono- and bi-layer WSe2
• Highly indistinguishable and strongly entangled photons from symmetric GaAs quantum dots
• Sub-Natural Linewidth Single Photons from a Quantum Dot
• Transform-limited single photons from a single quantum dot
• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• Long-Distance Entanglement Distribution with Single-Photon Sources
• Near Transform-Limited Single Photons from an Efficient Solid-State Quantum Emitter
• Non-resonant dot-cavity coupling and its applications in resonant quantum dot spectroscopy
• Highly indistinguishable on-demand resonance fluorescence photons from a deterministic quantum dot micropillar device with 75 $\%$ extraction efficiency
• Cascaded emission of single photons from the biexciton in monolayered WSe2
• High-yield fabrication of entangled photon emitters for hybrid quantum networking using high-temperature droplet epitaxy
• Atomic Clouds as Spectrally-Selective and Tunable Delay Lines for Single Photons from Quantum Dots
• Prospects for storage and retrieval of a quantum dot single photon in an ultracold ${}^{87}$Rb ensemble

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