A Fiber-pigtailed Quantum Dot Device Generating Indistinguishable Photons at GHz Clock-rates

Abstract

Solid-state quantum light sources based on semiconductor quantum dots (QDs) are increasingly employed in photonic quantum information applications. Especially when moving towards real-world scenarios outside shielded lab environments, the efficient and robust coupling of nanophotonic devices to single-mode optical fibers offers substantial advantage by enabling "plug-and-play" operation. In this work we present a fiber-pigtailed cavity-enhanced source of flying qubits emitting single indistinguishable photons at clock-rates exceeding $1$GHz. This is achieved by employing a fully deterministic technique for fiber-pigtailing optimized QD-devices based on hybrid circular Bragg grating (hCBG) micro-cavities. The fabricated fiber-pigtailed hCBGs feature radiative emission lifetimes of $<80$ps, corresponding to a Purcell factor of $\sim$9, a suppression of multi-photon emission events with $g^{(2)}(0)<1\%$, a photon-indistinguishability $>80\%$ and a measured single-photon coupling efficiency of 53$\%$ in a high numerical aperture single-mode fiber, corresponding to 1.2 Megaclicks per second at the single-photon detectors under $80$MHz excitation clock-rates. Furthermore, we show that high multi-photon suppression and indistinguishability prevail for excitation clock-rates exceeding $1$GHz. Our results show that Purcell-enhanced fiber-pigtailed quantum light sources based on hCBG cavities are a prime candidate for applications of quantum information science.

11 pages (+ 15 pages Supplementary Information), 5 figures (+ 10 figures Supplementary Information), 67 references

References in corpus (37)

• Photonic quantum technologies
• Device-independent security of quantum cryptography against collective attacks
• Near optimal single photon sources in the solid state
• A bright and fast source of coherent single photons
• Deterministic Generation of a Cluster State of Entangled Photons
• On-demand semiconductor source of entangled photons which simultaneously has high fidelity, efficiency, and indistinguishability
• Experimental device-independent quantum key distribution between distant users
• High Purcell factor generation of coherent on-chip single photons
• On-demand generation of background--free single photons from a solid-state source
• Near Transform-Limited Single Photons from an Efficient Solid-State Quantum Emitter
• Exploring Dephasing of a Solid-State Quantum Emitter via Time- and Temperature- Dependent Hong-Ou-Mandel Experiments
• Quantum Interference of Identical Photons from Remote GaAs Quantum Dots
• Sequential generation of linear cluster states from a single photon emitter
• Direct observation of nanofabrication influence on the optical properties of single self-assembled InAs/GaAs quantum dots
• Reducing phonon-induced decoherence in solid-state single-photon sources with cavity quantum electrodynamics
• Dissipative preparation of the exciton and biexciton in a self-assembled quantum dot on picosecond timescales
• A stand-alone fiber-coupled single-photon source
• Swing-up of quantum emitter population using detuned pulses
• Optimized Designs for Telecom-Wavelength Quantum Light Sources Based on Hybrid Circular Bragg Gratings
• Tailoring solid-state single-photon sources with stimulated emissions
• A quantum fiber-pigtail
• A fiber coupled cavity QED source of identical single photons
• A Quantum Key Distribution Testbed using a Plug&Play Telecom-wavelength Single-Photon Source
• Plug-and-play quantum devices with efficient fiber-quantum dot interface
• A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot
• Stimulated generation of indistinguishable single photons from a quantum ladder system
• Design study for an efficient semiconductor quantum light source operating in the telecom C-band based on an electrically-driven circular Bragg grating
• Numerical optimization of single-mode fiber-coupled single-photon sources based on semiconductor quantum dots
• Double-Pulse Generation of Indistinguishable Single Photons with Optically Controlled Polarization
• A fiber-integrated single photon source emitting at telecom wavelengths
• High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons
• Optical properties of circular Bragg gratings with labyrinth geometry to enable electrical contacts
• High-performance designs for fiber-pigtailed quantum-light sources based on quantum dots in electrically-controlled circular Bragg gratings
• High-efficiency single-photon source above the loss-tolerant threshold for efficient linear optical quantum computing
• Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band
• Nanocavity enhanced photon coherence of solid-state quantum emitters operating up to 30 K
• Efficient fiber-pigtailed source of indistinguishable single photons

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