A deterministically fabricated spectrally-tunable quantum dot based single-photon source

Spectrally-tunable quantum-light sources are key elements for the realization of long-distance quantum communication. A deterministically fabricated single-photon source with a photon-extraction efficiency of {\eta}=(20 +- 2) % and a tuning range of {\Delta}E=2.5 meV is presented here. The device co...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2018-05
Main Authors: Fischbach, S, Helversen, M v, Schmidt, M, Kaganskiy, A, Schmidt, R, Schliwa, A, Heindel, T, Rodt, S, Reitzenstein, S
Format: Article
Language:English
Subjects:
Broadband
Electron beam lithography
Emission
Gold
Light sources
Piezoelectric actuators
Piezoelectricity
Quantum dots
Repeaters
Spectra
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Spectrally-tunable quantum-light sources are key elements for the realization of long-distance quantum communication. A deterministically fabricated single-photon source with a photon-extraction efficiency of {\eta}=(20 +- 2) % and a tuning range of {\Delta}E=2.5 meV is presented here. The device consists of a single pre-selected quantum dot monolithically integrated into a microlens which is bonded onto a piezoelectric actuator via thermocompression goldbonding. The thin gold layer simultaneously acts as a backside mirror for the quantum dot emission, which is efficiently extracted from the device by an optimized lens structure patterned via 3D in-situ electron-beam lithography. The single-photon nature of the emission is proven by photon-autocorrelation measurements with \(g^{(2)}\) ({\tau}=0)=0.04 +- 0.02. The combination of deterministic fabrication, spectral-tunability and high broadband photon-extraction efficiency makes the microlens single-photon source an interesting building block towards the realization of quantum repeaters networks.
ISSN:2331-8422