Non-polar nitride quantum dots for application in single photon sources

Lead Research Organisation: University of Oxford
Department Name: Oxford Physics

Abstract

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Publications

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Biller S (2020) Slow fluors for effective separation of Cherenkov light in liquid scintillators in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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Kanta Patra S (2017) Theoretical and experimental analysis of radiative recombination lifetimes in nonpolar InGaN/GaN quantum dots Radiative recombination lifetimes in nonpolar InGaN/GaN QDs in physica status solidi (b)

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Kocher C (2021) Decreased Fast Time Scale Spectral Diffusion of a Nonpolar InGaN Quantum Dot in ACS Photonics

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Kocher C (2017) Highly polarized electrically driven single-photon emission from a non-polar InGaN quantum dot in Applied Physics Letters

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Park Y (2015) Reduced Stark shift in three-dimensionally confined GaN/AlGaN asymmetric multi-quantum disks in Optical Materials Express

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Park Y (2018) Temperature induced crossing in the optical bandgap of mono and bilayer MoS2 on SiO2. in Scientific reports

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Park YS (2015) Surface-Effect-Induced Optical Bandgap Shrinkage in GaN Nanotubes. in Nano letters

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Puchtler TJ (2016) Ultrafast, Polarized, Single-Photon Emission from m-Plane InGaN Quantum Dots on GaN Nanowires. in Nano letters

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Reid B (2015) Non-polar InGaN quantum dot emission with crystal-axis oriented linear polarization in Applied Physics Letters

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Villafañe V (2023) Three-Photon Excitation of InGaN Quantum Dots in Physical Review Letters

 
Description We have been successful in producing single photon sources pumped optically in InGaN a-plane quantum dots systems that emit single photons with a lifetime of 1ns at temperatures up to 220K. These emitters are strongly polarised and very bright. We have further succeeded in pumping a p-i-n structure with embedded InGaN quantum dots electrically to produce an electrically driven single photon source.
Exploitation Route The next stage in the production of single photons in the blue on demand is to take our planar p-i-n structure and incorporate it in a microcavity, which we can then contact electrically and produce bright, single blue photons on demand at a high repetition rate with got spatial modes. This will require further funding and development over 3 - 5 years.
Sectors Digital/Communication/Information Technologies (including Software)
 
Description The quantum dots and the optical techniques used to investigate them came to the attention of the company Quantopticon, who wished to develop and test their modelling software product, This led to an Innovate UK application entitled "Simulation Software for Modelling Quantum Light Sources", which was for 1 year and was successful and will commence on 1st March 2018. This has now produced a saleable product and further funding is being sought by the company to develop the product further. A new company has been spun out in Cambridge, partly as a result of this project as well as other EPSRC funded programmes, called Poro Technologies by Prof. Rachel Oliver and Dr. Tontong Zhu making high reflectivity mirrors as an integral part of GaN wafers for optoelectronic applications.
First Year Of Impact 2017
Sector Digital/Communication/Information Technologies (including Software)
Impact Types Economic
 
Description Innovate UK
Amount £364,675 (GBP)
Funding ID EP/R044554/1 
Organisation Engineering and Physical Sciences Research Council (EPSRC) 
Sector Public
Country United Kingdom
Start 03/2018 
End 02/2019
 
Description Produced an animation for use on the Oxford Sparks public engagement website on single photon sources 
Form Of Engagement Activity Engagement focused website, blog or social media channel
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Schools
Results and Impact The Oxford Sparks website hosts animations on science generated by researchers in Oxford. This animation deals with single photon sources and is aimed at informing the general public and schoolchildren about the research field and also refers to quantum computing. There are school materials for use by teachers available which supplement the animation and add impact through education.
Year(s) Of Engagement Activity 2016
URL http://www.oxfordsparks.ox.ac.uk/content/our-media