Efficient Source of Shaped Single Photons Based on an Integrated Diamond Nanophotonic System

Abstract

An efficient, scalable source of shaped single photons that can be directly integrated with optical fiber networks and quantum memories is at the heart of many protocols in quantum information science. We demonstrate a deterministic source of arbitrarily temporally shaped single-photon pulses with high efficiency (detection efficiency = 14.9%) and purity ($g^{(2)}(0)=0.0168$) and streams of up to 11 consecutively detected single photons using a silicon-vacancy center in a highly directional fiber-integrated diamond nanophotonic cavity. Combined with previously demonstrated spin-photon entangling gates, this system enables on-demand generation of streams of correlated photons such as cluster states and could be used as a resource for robust transmission and processing of quantum information.

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• Zero-Added-Loss Entangled Photon Multiplexing for Ground- and Space-Based Quantum Networks
• Deterministic Laser Writing of Spin Defects in Nanophotonic Cavities
• Near-deterministic hybrid generation of arbitrary photonic graph states using a single quantum emitter and linear optics
• Fundamental limits of pulsed quantum light spectroscopy: Dipole moment estimation
• 'Sawfish' Photonic Crystal Cavity for Near-Unity Emitter-to-Fiber Interfacing in Quantum Network Applications
• Efficient High-Fidelity Flying Qubit Shaping
• Efficient generation of entangled multi-photon graph states from a single atom