Manipulating polariton condensates
by Rashba-Dresselhaus coupling at room temperature
Dr. Tingge Gao, Tianjin University (China)
10/10/2021, 11 am MSK / 9 am CET
Abstract
Spin-orbit coupling plays an important role in the spin Hall effect, in topological insulators. Recently the synthetic spin orbit coupling on cavity photons in microcavities attract intensive attention [1-3]. Following this exciting direction, in this talk we will discuss how to tune an exciton polariton condensate -- a macroscopically coherent state of hybrid light and matter excitations -- by virtue of the Rashba-Dresselhaus (RD) spin-orbit coupling [4]. This is achieved in a liquid-crystal filled microcavity where perovskite CsPbBr3 microplates act as the gain material at room temperature. Specifically, we realize an artificial gauge field acting on the CsPbBr3 exciton polariton condensate, splitting the condensate fractions with opposite spins in both momentum and real spaces. Our work paves the way to manipulate exciton polariton condensates with a synthetic gauge field based on the RD spin-orbit coupling at room temperature.
[1] Lekenta, K et.al, Light Sci. Appl.7, 1-6 (2018).
[2] Rechcińska, K et. al., Science. 366, 727-730 (2019).
[3] Muszyński, M et.al., https://arxiv.org/pdf/2109.07338
[4] Yao, Li et.al., https://arxiv.org/abs/2108.02057
About the speaker
Dr Tingge Gao obtained his Bachelor (Master) degree from Beijing Normal University (Peking University) at 2005 (2008). At 2010 he was funded by Clermont IV program and got his PhD degree at University of Crete, Greece at 2014 under the supervision of Professor Pavlos Savvidis. Then he went to the Australian National University for postdoc focusing on the non-Hermitian properties of exciton polaritons. At 2018 he joined Tianjin University, Tianjin, China. His research is mainly about exciton polaritons in GaAs, TMD and perovskite microcavities.
Date & Location
Date & Location
The event will be taking place on the 10th of October 2021 at 11 am MSK time (9 am CET).
Access details: Zoom (Meeting ID: 962 4930 8286 / Passcode: 457552)
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