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Stochastic spin flips in polariton condensates: Nonlinear tuning from GHz to sub-Hz
Authors
Baumberg J.J.
Beer O.
+7 more
Del Valle-Inclan Redondo Y.
Hatzopoulos Z.
Ohadi H.
Ramsay A.J.
Savvidis P.G.
Tsintzos S.I.
Yuri G Rubo
Publication date
1 July 2018
Publisher
IOP PUBLISHING LTD
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 ∼0.6, in contrast with previous literature suggestions. © 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaf
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oai:pr.ibs.re.kr:8788114/4947
Last time updated on 06/02/2020