Strain tunable single-photon source based on a quantum dot-micropillar system

Abstract

Scalable quantum photonic architectures demand highly efficient, high-purity single-photon sources, which can be frequency matched via external tuning. We demonstrate a single-photon source based on an InAs quantum dot embedded in a micropillar resonator, which is frequency tunable via externally-applied stress. Our platform combines the advantages of a Bragg micropillar cavity and the piezo-strain-tuning technique enabling single photon spontaneous emission enhancement via the Purcell effect and quantum dot (QD) with tunable wavelength. Our optomechanical platform has been implemented by integration of semiconductor-based QD-micropillars on a piezoelectric substrate. The fabricated device exhibits spontaneous emission enhancement with a Purcell factor of 4.4$\pm$0.7 and allows for a pure triggered single-photon generation with $g^{(2)}(0)$ < 0.07 under resonant excitation. A quantum dot emission energy tuning range of 0.75 meV for 27 kV/cm applied to the piezo substrate has been achieved. Our results pave the way towards the scalable implementation of single-photon quantum photonic technologies using optoelectronic devices.

16 pages, 4 figures

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Cited by in corpus (10)

• GaAs quantum dots grown by droplet etching epitaxy as quantum light sources
• Large-Range Frequency Tuning of a Narrow-Linewidth Quantum Emitter
• Opto-Mechanical Tuning of the Polarization Properties of Micropillar Cavity Systems with embedded Quantum Dots
• Three-dimensional electrical control of the excitonic fine structure for a quantum dot in a cavity
• Multi-time correlations in the positive-P, Q, and doubled phase-space representations
• Optically tunable photoluminescence and upconversion lasing on a chip
• Multipartite entanglement generation in coupled microcavity arrays
• Scalable multiphoton generation from cavity-synchronized single-photon sources
• Using the Autler-Townes and ac Stark effects to optically tune the frequency of indistinguishable single-photons from an on-demand source
• Mechanisms and Opportunities for Tunable High-Purity Single Photon Emitters: A Review of Hybrid Perovskites and Prospects for Bright Squeezed Vacuum