Stochastic spin flips in polariton condensates : nonlinear tuning from GHz to sub-Hz

Redondo, Yago del Valle-Inclan; Ohadi, Hamid; Rubo, Yuri G.; Beer, Orr; Ramsay, Andrew J.; Tsintzos, Symeon; Hatzopoulos, Zacharias; Savvidis, Pavlos G.; Baumberg, Jeremy J.

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Date

26/07/2018

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Abstract

The stability of spin of macroscopic quantum states to intrinsic noise is studied for non-resonantly-pumped optically-trapped polariton condensates. We demonstrate flipping between the two spin-polarised states with >104 slow-down of the flip rate by tuning the optical pump power. Individual spin flips faster than 50 ps are time resolved using single-shot streak camera imaging. We reproduce our results within a mean-field model accounting for cross-spin scattering between excitons and polaritons, yielding a ratio of cross-to co-spin scattering of similar to ∼0.6, in contrast with previous literature suggestions.

Citation

Redondo , Y D V-I , Ohadi , H , Rubo , Y G , Beer , O , Ramsay , A J , Tsintzos , S , Hatzopoulos , Z , Savvidis , P G & Baumberg , J J 2018 , ' Stochastic spin flips in polariton condensates : nonlinear tuning from GHz to sub-Hz ' , New Journal of Physics , vol. 20 , 075008 . https://doi.org/10.1088/1367-2630/aad377

Publication

New Journal of Physics

Status

Peer reviewed

DOI

https://doi.org/10.1088/1367-2630/aad377

ISSN

1367-2630

Type

Journal article

Rights

© 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Description

We acknowledge Grants No. EPSRC EP/L027151/1, ERC LINASS 320503, Leverhulme Trust Grant No. VP1-2013-011 and bilateral Greece-Russia 'Polisimulator' project co-financed by Greece and the EU Regional Development Fund. PS acknowledges Saint-Petersburg State University research grant 11.34.2.2012 and ΑΕΝΑΟ project co-financed by the European Union ERDF and Greek national NSRF 2014-2020 funds. ST acknowledges financial support from the Stavros Niarchos Foundation, 'ARCHERS' project. AJR acknowledges support of Horizon 2020 programme (No. FETPROACT-2016 732894-HOT). YGR acknowledges support from CONACYT (Mexico) grant No. 251808 and by the Institute for Basic Science in Korea (IBS-R024-D1).

Collections

University of St Andrews Research

URI

http://hdl.handle.net/10023/15799