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

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

doi:10.1088/1367-2630/aad377

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

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

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	075008
Number of pages	8
Journal	New Journal of Physics
Volume	20
DOIs	https://doi.org/10.1088/1367-2630/aad377
Publication status	Published - 26 Jul 2018

Keywords

Exciton-polariton
Spin dynamics
Non-equilibrium condensate
Driven-dissipative
Chaos

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© 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.
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@article{1c17be97bdcc4554ada7bdbbecf3d0cb,

title = "Stochastic spin flips in polariton condensates: nonlinear tuning from GHz to sub-Hz",

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.",

keywords = "Exciton-polariton, Spin dynamics, Non-equilibrium condensate, Driven-dissipative, Chaos",

author = "Redondo, \{Yago del Valle-Inclan\} and Hamid Ohadi and Rubo, \{Yuri G.\} and Orr Beer and Ramsay, \{Andrew J.\} and Symeon Tsintzos and Zacharias Hatzopoulos and Savvidis, \{Pavlos G.\} and Baumberg, \{Jeremy J.\}",

note = "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).",

year = "2018",

month = jul,

day = "26",

doi = "10.1088/1367-2630/aad377",

language = "English",

volume = "20",

journal = "New Journal of Physics",

issn = "1367-2630",

publisher = "Institute of Physics",

}

TY - JOUR

T1 - Stochastic spin flips in polariton condensates

T2 - nonlinear tuning from GHz to sub-Hz

AU - Redondo, Yago del Valle-Inclan

AU - Ohadi, Hamid

AU - Rubo, Yuri G.

AU - Beer, Orr

AU - Ramsay, Andrew J.

AU - Tsintzos, Symeon

AU - Hatzopoulos, Zacharias

AU - Savvidis, Pavlos G.

AU - Baumberg, Jeremy J.

N1 - 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).

PY - 2018/7/26

Y1 - 2018/7/26

N2 - 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.

AB - 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.

KW - Exciton-polariton

KW - Spin dynamics

KW - Non-equilibrium condensate

KW - Driven-dissipative

KW - Chaos

U2 - 10.1088/1367-2630/aad377

DO - 10.1088/1367-2630/aad377

M3 - Article

SN - 1367-2630

VL - 20

JO - New Journal of Physics

JF - New Journal of Physics

M1 - 075008

ER -

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

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