Optical fibre-based single photon source using InAsP quantum dot nanowires and gradient-index lens collection

AbstractWe present a compact, fibre-coupled single photon source using gradient-index (GRIN) lenses and an InAsP semiconductor quantum dot embedded within an InP photonic nanowire waveguide. A GRIN lens assembly is used to collect photons close to the tip of the nanowire, coupling the light immediately into a single mode optical fibre. The system provides a stable, high brightness source of fibre-coupled single photons. Using pulsed excitation, we demonstrate on-demand operation with a single photon purity of 98.5% when exciting at saturation in a device with a source-fibre collection efficiency of 35% and an overall single photon collection efficiency of 10%. We also demonstrate “plug and play” operation using room temperature photoluminescence from the InP nanowire for room temperature alignment.

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Room temperature electrically injected In0.4Ga0.6N/GaN quantum-dot visible (λ=620 nm) single photon source

2014 IEEE Photonics Conference ◽

10.1109/ipcon.2014.6995493 ◽

2014 ◽

Author(s):

Saniya Deshpande ◽

Thomas Frost ◽

Arnab Shashi Hazari ◽

Pallab Bhattacharya

Keyword(s):

Quantum Dot ◽

Room Temperature ◽

Single Photon ◽

Single Photon Source ◽

Photon Source

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An Easy-Implemented On-Chip Waveguide Coupled Single Photon Source Based on Self-Assembled Quantum Dots Membrane

Applied Sciences ◽

10.3390/app11020695 ◽

2021 ◽

Vol 11 (2) ◽

pp. 695

Author(s):

Ping Jiang ◽

Na Ma ◽

Peng Liu ◽

Wenxuan Wu ◽

Kai Zhang

Keyword(s):

Quantum Dot ◽

Cross Correlation ◽

Single Photon ◽

Photon Statistics ◽

Single Photons ◽

Single Photon Source ◽

Photonic Circuit ◽

On Chip ◽

Photon Source ◽

Scatter Light

In recent years, many groups and institutions have been committed to the research of integrated quantum photonic circuit technologies, of which the key components are waveguide coupled single photon sources. In this study, we propose an on-chip waveguide-coupled single photon source that is easily implemented as the waveguide is directly made from the quantum dot membrane. In order to scatter light out of the on-chip waveguide plane into the detection apparatus, grating output couplers are made at both ends of the waveguide. The photon statistics of the on-chip photon source were investigated by second-order correlation function g(2)(τ) measurements using a Hanbury Brown and Twiss interferometer. From the spectra and cross-correlation experiments by collecting emission at the point of quantum dot and out coupler, the emitting of single photons from the same quantum dot and propagating via the waveguide to the out couplers was confirmed. These results show that we have achieved an on-chip single photon source that is easily implemented and easily integrated into quantum photonic circuits.

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Room-temperature generation of heralded single photons on silicon chip with switchable orbital angular momentum

10.21203/rs.3.rs-1233640/v1 ◽

2022 ◽

Author(s):

Shan Zhang ◽

Xue Feng ◽

Wei Zhang ◽

Kaiyu Cui ◽

Fang Liu ◽

...

Keyword(s):

Angular Momentum ◽

Orbital Angular Momentum ◽

Room Temperature ◽

Quantum Information Processing ◽

Single Photon ◽

High Dimensional ◽

Single Photons ◽

Single Photon Source ◽

Material Systems ◽

Photon Source

Abstract In quantum optics, orbital angular momentum (OAM) is very promising to achieve high-dimensional quantum states due to the nature of infinite and discrete eigenvalues, which is quantized by the topological charge of l. Here, a heralded single-photon source with switchable OAM modes is proposed and demonstrated on silicon chip. At room-temperature, the heralded single photons with 11 OAM modes (l=2~6, -6~-1) have been successfully generated and switched through thermo-optical effect. We believe that such an integrated quantum source with multiple OAM modes and operating at room-temperature would provide a practical platform for high-dimensional quantum information processing. Moreover, our proposed architecture can also be extended to other material systems to further improve the performance of OAM quantum source.

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