Spin currents and superfluidity of microcavity polaritons
Lead Research Organisation:
CARDIFF UNIVERSITY
Department Name: School of Physics and Astronomy
Abstract
The overall goal of the project is to detect experimentally exciton-polariton superfluids and spin currents in microcavities and to develop a full quantum theory of exciton-polariton superfluidity. The fingerprints of polariton superfluidity will be searched for in spatially- and directionally-resolved optical measure-ments with spectral, temporal and polarization-detection, with or without application of external magnetic fields, on improved quality strain free microcavity samples. We shall look for conventional and superfluid polariton spin currents in the regime of the optical spin Hall effect. We expect theoretically important dif-ferences between polariton and conventional superfluids caused by a peculiar dispersion and spin structure of exciton-polaritons. We aim to study theoretically and experimentally the polarization dynamics of both resonantly and non-resonantly excited polariton condensates to reveal the specifics of polariton superfluid-ity and search for new effects including the optical spin-Hall effect and the spin analogue of the Meissner effect.
People |
ORCID iD |
Wolfgang Langbein (Principal Investigator) |
Publications
Zajac J
(2012)
Suppression of cross-hatched polariton disorder in GaAs/AlAs microcavities by strain compensation
in Applied Physics Letters
Cilibrizzi P
(2014)
Polariton condensation in a strain-compensated planar microcavity with InGaAs quantum wells
in Applied Physics Letters
Zajac, J M
(2011)
Photonic disorder in planar semiconductor microcavities
in Abstract Book of OECS 12 (12-16 September 2011, Paris, France)
Zajac, J M
(2011)
Localized polaritons states in planar microcavities
in Abstract Book of Conference on Cold Atoms, Semiconductor Polaritons and Nanoscience, POLATOM ESF research networking programme (May 2 - 6, 2011, Chersonissos, Crete, Greece)
Silva, Matteo
(2017)
Measure the Heisenberg interaction in a polariton dyad
in 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (Cleo/europe-Eqec)
Sassermann, M.
(2017)
Correlated Photons From Microcavity Polariton Parametric Scattering
in 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (Cleo/europe-Eqec)
Description | The disorder in planar microcavities was investigated, and a growth method was developed to reduce this disorder |
Exploitation Route | The identification and reduction of the disorder in microscavties is important for the investigation of polariton lasers and condensates, allowing to study interesting many-particle physics. Furthermore, it i simportant for the development of polariton lasers as well as VCSELs |
Sectors | Digital/Communication/Information Technologies (including Software),Electronics,Energy |
Description | The method of reduction of the disorder in semiconductor microcavities is used to improve polariton lasers and VCSELs |
First Year Of Impact | 2012 |
Sector | Digital/Communication/Information Technologies (including Software),Electronics,Energy |
Impact Types | Economic |
Description | Responsive Mode |
Amount | £1,200,000 (GBP) |
Funding ID | EP/P011470/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 04/2017 |
End | 03/2020 |
Description | Southampton Pavlos Lagoudakis |
Organisation | University of Southampton |
Department | Institute of Developmental Sciences |
Country | United Kingdom |
Sector | Academic/University |
PI Contribution | Designed Microscoiuty structure Provided structure to partner for further measurements |
Collaborator Contribution | Measured on microcavity structure. Published results in common publications |
Impact | Several journal publications |
Start Year | 2008 |