A strain-tunable quantum dot embedded in a nanowire antenna

Abstract

We demonstrate an elastically-tunable self-assembled quantum dot in a nanowire antenna that emits single photons with resolution-limited spectral linewidths. The single-photon device is comprised of a single quantum dot embedded in a top-down fabricated nanowire waveguide integrated onto a piezoelectric actuator. Non-resonant excitation leads to static (fluctuating) charges likely at the nanowire surface, causing DC Stark shifts (inhomogeneous broadening); for low excitation powers, the effects are not observed and resolution-limited linewidths are obtained. Despite significant strain-field relaxation in the high-aspect-ratio nanowires, we achieve up to 1.2 meV tuning of a dot's transition energy. Single-photon sources with high brightness, resolution-limited linewidths, and wavelength tunability are promising for future quantum technologies.

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Cited by in corpus (11)

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• Strain-Tuning of the Optical Properties of Semiconductor Nanomaterials by Integration onto Piezoelectric Actuators
• Resonant driving of a single photon emitter embedded in a mechanical oscillator
• Strain tunable single-photon source based on a quantum dot-micropillar system
• Quantum Antennas
• Large and uniform optical emission shifts in quantum dots externally strained along their growth axis
• Static strain tuning of quantum dots embedded in a photonic wire
• Comparison of different bonding techniques for efficient strain transfer using piezoelectric actuators
• Multiplexed Single Photons from Deterministically Positioned Nanowire Quantum Dots
• Universal finestructure eraser for quantum dots
• Optically tunable photoluminescence and upconversion lasing on a chip