Purcell-enhanced single-photon generation from CsPbBr${}_3$ quantum dots in in-situ selected Laguerre-Gaussian modes

Abstract

Single photons in Laguerre-Gaussian (LG) beams, which carry orbital angular momentum (OAM), could enable more robust and efficient photonic quantum communication and information processing, as well as enhanced sensitivity in quantum metrology and imaging. However, as most implementations are indirect or require additional mode-shaping elements, direct generation of single photons with OAM has received growing interest. Colloidal lead halide perovskite quantum dots (QDs) have recently emerged as a versatile material that can produce indistinguishable single photons quasi-deterministically at high rate. Here, we integrate single CsPbBr${}_3$ QDs into an open Fabry-Perot microcavity with a nanofabricated Gaussian-shaped deformation, demonstrating Purcell-enhanced single-photon generation into individual cavity modes with up to 18.1 $\pm$ 0.2 times accelerated decay, down to tens of picoseconds. By in-situ tuning of the cavity resonance, we can selectively couple a single QD to different LG modes carrying OAM and observe the spatial patterns of the generated single-photon beams emitted from the cavity. Our findings open the door to high photon rate sources that directly generate single-photon LG beams for advanced quantum photonic applications.

References in corpus (14)

• Interfacing single photons and single quantum dots with photonic nanostructures
• Near optimal single photon sources in the solid state
• Bright triplet excitons in lead halide perovskites
• Advances in High Dimensional Quantum Entanglement
• A bright and fast source of coherent single photons
• Coherent Single Photon Emission from Colloidal Lead Halide Perovskite Quantum Dots
• Towards optimal single-photon sources from polarized microcavities
• High Purcell factor generation of coherent on-chip single photons
• Physical meaning of the radial index of Laguerre-Gauss beams
• On-Chip Spin-Orbit Controlled Excitation of Quantum Emitters Coupled to Hybrid Plasmonic Nanocircuits
• High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons
• Room-temperature cavity exciton-polariton condensation in perovskite quantum dots
• Circularly Polarized Luminescence Without External Magnetic Fields from Individual CsPbBr3 Perovskite Quantum Dots
• Cavity quantum electrodynamics with single perovskite quantum dots