Long wavelength single photon sources and dotonic molecules
Lead Research Organisation:
University of Oxford
Department Name: Oxford Physics
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Publications
Brossard FS
(2013)
Confocal microphotoluminescence mapping of coupled and detuned states in photonic molecules.
in Optics express
Kim H
(2016)
Exciton Dipole-Dipole Interaction in a Single Coupled-Quantum-Dot Structure via Polarized Excitation.
in Nano letters
Kim H
(2017)
Quasi-one-dimensional density of states in a single quantum ring.
in Scientific reports
Kim HD
(2016)
Observation of a Biexciton Wigner Molecule by Fractional Optical Aharonov-Bohm Oscillations in a Single Quantum Ring.
in Nano letters
Lennon SA
(2018)
Photonic molecules defined by SU-8 photoresist strips on a photonic crystal waveguide.
in Optics express
Nuttall L
(2017)
Optical fabrication and characterisation of SU-8 disk photonic waveguide heterostructure cavities
in Optics Express
Shao H
(2020)
Purcell enhancement of a deterministically coupled quantum dot in an SU-8 laser patterned photonic crystal heterostructure
in Applied Physics Letters
Wang X
(2019)
III-V compounds as single photon emitters
in Journal of Semiconductors
Description | There have been two main findings arising from this project. In the first we showed that by adjusting the hole separation near two coupled photonic crystal cavities we could introduce an optical well which enabled us to control the coupling and splitting between two cavities with unprecedented precision, allowing for the possibility of using this technique to engineer coupled photonic molecules using single quantum dots in the future. The second key finding involved using a photoresist to define an optical cavity in a waveguide structure. This has the advantage of being able to pick an individual quantum dot in the correct spatial position, with the correct spectral profile such that it could couple strongly to the induced cavity mode. Work is ongoing following the end of the grant to improve the Q-factor obtained, and initial results are extremely promising. We have now managed to produce photonic molecules using this technique and a paper on this has appeared in Optics Express. The output was also disseminated in a major international confrerencei n one oral and one invited paper in Chengdu in China in 2018. |
Exploitation Route | Photonic engineers may well be able to use the findings to design new single photon emitters where the yield for producing strong coupling is enhanced hugely compared to the common method which relies on chance to produce such coupling. |
Sectors | Digital/Communication/Information Technologies (including Software) Electronics |
Description | Collaboration with Hitachi Cambridge Laboratories on design and production of photonic crystals |
Organisation | Hitachi Cambridge Laboratory |
Country | United Kingdom |
Sector | Private |
PI Contribution | We make the optical measurements on the photonics crystals. |
Collaborator Contribution | Hitachi produce the crystals and pay for their production. |
Impact | All publications which use Hitachi expertise have the authors and institution credited. |
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 |