Optical transparency induced by a largely Purcell-enhanced quantum dot in a polarization-degenerate cavity

Abstract

Optically-active spin systems coupled to photonic cavities with high cooperativity can generate strong light-matter interactions, a key ingredient in quantum networks. But obtaining high cooperativities for quantum information processing often involves the use of photonic crystal cavities that feature a poor optical access from the free space, especially to circularly polarized light required for the coherent control of the spin. Here, we demonstrate coupling with cooperativity as high as $8$ of an InAs/GaAs quantum dot to a fabricated bullseye cavity that provides nearly degenerate and Gaussian polarization modes for efficient optical accessing. We observe spontaneous emission lifetimes of the quantum dot as short as $80$ ps (a $\approx 15$ Purcell enhancement) and a $\approx 80\%$ transparency of light reflected from the cavity. Leveraging the induced transparency for photon switching while coherently controlling the quantum dot spin could contribute to ongoing efforts of establishing quantum networks.

References in corpus (7)

• The Quantum Internet
• A solid-state entangled photon pair source with high brightness and indistinguishability
• Deterministic Generation of a Cluster State of Entangled Photons
• Three megahertz photon collection rate from an NV center with millisecond spin coherence
• Quantum control of a spin qubit coupled to a photonic crystal cavity
• Resonance fluorescence of GaAs quantum dots with near-unity photon indistinguishability
• Bright Purcell enhanced single-photon source in the telecom O-band based on a quantum dot in a circular Bragg grating

Cited by in corpus (7)

• Quantum dots for photonic quantum information technology
• 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
• Polarized and Un-Polarized Emission from a Single Emitter in a Bullseye Resonator
• Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band
• Post-fabrication tuning of circular Bragg resonators for enhanced emitter-cavity coupling
• Purcell enhanced and tunable single-photon emission at telecom wavelengths from InAs quantum dots in circular photonic crystal resonators