| EPSRC Reference: |
EP/M508263/1 |
| Title: |
Fibre wavelength quantum light sources |
| Principal Investigator: |
Ritchie, Professor D |
| Other Investigators: |
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| Department: |
Physics |
| Organisation: |
University of Cambridge |
| Scheme: |
Technology Programme |
| Starts: |
01 July 2015 |
Ends: |
31 December 2016 |
Value (£): |
99,880
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Summary on Grant Application Form |
The Cambridge team will develop quantum dot single photon emitters for Quantum Communications. The overall project
aims are to demonstrate the controlled emission of entangled photons from an LED structure emitting at a wavelength of
1.55microns. This wavelength is the standard wavelength for fibre communications. Devices operating at this wavelength
will be required to achieve commercially significant Quantum Communications technologies. However entangled photons
from quantum dots at this wavelength have not been demonstrated and there is a significant epitaxy challenge in
developing this technology.
The Cambridge team will develop Indium Arsenide quantum dots grown on Indium Phosphide substrates by Molecular
Beam Epitaxy (MBE), complementing and contrasting with the development by Metal Organic Vapour Phase Epitaxy
(MOVPE) in Sheffield. To demonstrate single photon emitters at this wavelength is challenging and there is a need to
investigate the properties of the quantum dots by both techniques to understand how the quantum dots form and what
controls the fundamental properties that will generate photon entanglement; including aspects such as the exciton spin
splitting value. The work will build significantly on the prior work carried out at shorter wavelengths in Sheffield, Toshiba
and Cavendish laboratories using a different material system. In particular at Sheffield the result of quantum dot structures
developed under an EPSRC Programme Grant will benefit the project strongly since many of the physical properties may
be similar. The demonstration of high quality devices at this wavelength will be a significant milestone in matching Quantum
Communications to the current non-quantum fibre-communications infrastructure.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.cam.ac.uk |