Spin currents and superfluidity of microcavity polaritons

Lead Research Organisation: Cardiff University
Department Name: School of Physics and Astronomy


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.


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Cilibrizzi P (2015) Cilibrizzi et al. Reply. in Physical review letters

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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)

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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)

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