Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD)

Single-photon and entangled-photon sources for quantum information

D. A. Ritchie, R. M. Stevenson, Robert James Young, A J Hudson, C. L. Salter, D. J. P. Ellis, Anthony J. Bennett, P. Atkinson, K Cooper, Ian A. Farrer, Christine A. Nicoll, Andrew J. Shields

Published Dec 1, 2010• 2 citations
Publisher

Abstract

We have fabricated and demonstrated the operation of triggered sources of single-photons and entangled-photon pairs using self-assembled InAs quantum dots grown by MBE.
DOI
10.1109/commad.2010.5699754

Related papers

Entangled Photon Pair Sources Fabricated from InAs Quantum Dots

D. A. Ritchie, R. M. Stevenson, Robert James Young +7 more

We have fabricated and optimized triggered sources of entangled photon pairs using self-assembled InAs quantum dots. After optimization, a fidelity to the ideal entangled state of over 90% has been achieved.

Advances in Optical Sciences Congress•Jan 1, 2009•0 citations

Entanglement generation in semiconductor nanostructures

Laia Ginés, Junior R. Gonzales-Ureta, Magdalena Moczała-Dusanowska +4 more

Single self-assembled quantum dots are established emitters of single photons and entangled photon pairs. The entanglement of photons generated by quantum dots has been shown in polarization [1] , in time bin [2] , and also as hyperentanglement [3] . However, the achievable degree of entanglement and readiness of the source for use in quantum communication protocols, depend on several additional functionalities such as high collection efficiency, coherence of the emitted photon pairs, and fabrication scalability.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 21, 2021•0 citations

Single-Photon and Quantum Entangled Photon-Pair Sources for Quantum Information Communications

Ikuo Suemune, H. Kumano, Hirotaka Sasakura

Kogaku/Kōgaku•Sep 10, 2011•0 citations

Entangled photons produced with high-symmetry site-controlled quantum dots

Arun Mohan, Marco Felici, Pascal Gallo +4 more

In recent years it has been realized that quantum entanglement could have many applications in the nascent field of quantum information technology [1]. While most existing sources for entangled photons rely on nonlinear optical effects [2], triggered entangled photons provide the benefit of being event-ready for application. The radiative decay of biexcitons in a quantum dot (QD) has been proposed [3] and recently demonstrated [4,5,6] as a source of triggered polarization-entangled photon pairs. However, in most cases the anisotropy-induced exciton fine structure splitting destroys this entanglement. The key to the generation of entangled photon pairs in a QD is therefore the suppression of the exciton polarization splitting. Seeded self-ordering, which involves the self-formation of nanostructures at nucleation sites introduced by a substrate patterning process [7], is particularly attractive because it allows for control over the size and shape of the QD. In particular, pyramidal QDs grown in this way on (111)B GaAs substrates have a higher symmetry (C3v) [8] as compared with self-assembled Stranski-Krastanow QDs (C2v). This feature makes them a prime candidate for efficient sources of entangled photons.

Conference proceedings. ... International Conference on Indium Phosphide and Related Materials•May 1, 2009•7 citations

Towards Scalable Entangled Photon Sources with Self-Assembled InAs/GaAs Quantum Dots

Jianping Wang, Ming Gong, Guang-Can Guo +1 more

The biexciton cascade process in self-assembled quantum dots (QDs) provides an ideal system for realizing deterministic entangled photon-pair sources, which are essential to quantum information science. The entangled photon pairs have recently been generated in experiments after eliminating the fine-structure splitting (FSS) of excitons using a number of different methods. Thus far, however, QD-based sources of entangled photons have not been scalable because the wavelengths of QDs differ from dot to dot. Here, we propose a wavelength-tunable entangled photon emitter mounted on a three-dimensional stressor, in which the FSS and exciton energy can be tuned independently, thereby enabling photon entanglement between dissimilar QDs. We confirm these results via atomistic pseudopotential calculations. This provides a first step towards future realization of scalable entangled photon generators for quantum information applications.

arXiv:1412.2826•Physical Review Letters•Aug 5, 2015•32 citations

GENERATION OF SINGLE PHOTONS AND ENTANGLED PHOTON PAIRS FROM A QUANTUM DOT

Y. Yamamoto, Matthew A. Pelton, Charles Santori +1 more

Foundations of Quantum Mechanics in the Light of New Technology•Oct 1, 2002•0 citations
Single self-assembled quantum dots are established emitters of single photons and entangled photon pairs. The entanglement of photons generated by quantum dots has been shown in polarization [1] , in time bin [2] , and also as hyperentanglement [3] . However, the achievable degree of entanglement and readiness of the source for use in quantum communication protocols, depend on several additional functionalities such as high collection efficiency, coherence of the emitted photon pairs, and fabrication scalability.
In recent years it has been realized that quantum entanglement could have many applications in the nascent field of quantum information technology [1]. While most existing sources for entangled photons rely on nonlinear optical effects [2], triggered entangled photons provide the benefit of being event-ready for application. The radiative decay of biexcitons in a quantum dot (QD) has been proposed [3] and recently demonstrated [4,5,6] as a source of triggered polarization-entangled photon pairs. However, in most cases the anisotropy-induced exciton fine structure splitting destroys this entanglement. The key to the generation of entangled photon pairs in a QD is therefore the suppression of the exciton polarization splitting. Seeded self-ordering, which involves the self-formation of nanostructures at nucleation sites introduced by a substrate patterning process [7], is particularly attractive because it allows for control over the size and shape of the QD. In particular, pyramidal QDs grown in this way on (111)B GaAs substrates have a higher symmetry (C3v) [8] as compared with self-assembled Stranski-Krastanow QDs (C2v). This feature makes them a prime candidate for efficient sources of entangled photons.
The biexciton cascade process in self-assembled quantum dots (QDs) provides an ideal system for realizing deterministic entangled photon-pair sources, which are essential to quantum information science. The entangled photon pairs have recently been generated in experiments after eliminating the fine-structure splitting (FSS) of excitons using a number of different methods. Thus far, however, QD-based sources of entangled photons have not been scalable because the wavelengths of QDs differ from dot to dot. Here, we propose a wavelength-tunable entangled photon emitter mounted on a three-dimensional stressor, in which the FSS and exciton energy can be tuned independently, thereby enabling photon entanglement between dissimilar QDs. We confirm these results via atomistic pseudopotential calculations. This provides a first step towards future realization of scalable entangled photon generators for quantum information applications.