Ultrafast dynamics of polariton condensation at room temperature
Prof. Hui Li, East China Normal University, Shanghai, China
17/10/2024, 10:00 CET
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Abstract
Abstract
Study on ultrafast dynamics is an important foundation for revealing microscopic physical mechanisms and achieving effective property control. Focusing on the ultrafast dynamics of microcavity exciton polariton (EP) condensates at room temperature, we have developed the femtosecond angle-resolved spectroscopic imaging (FARSI) techinique which enables multidimensional, time-resolved measurements of photoluminescence with femtosecond resolution. We have investigated the ultrafast dynamics of macroscopic quantum states of EP condensates, revealed the formation, relaxation and parametric scattering dynamics of the condensates under non-resonant excitation [1,2] and observed the bosonic cascading dynamics in EPs [3]. Further, we have proposed novel schemes based on precision control in the temporal domain to achieve ultrafast polariton device functionalities. We have achieved femtosecond switching in room-temperature polariton BEC with ultra-high extinction ratio based on manipulating the parametric process of the photonic part in EPs [4]. A full set of polaritonic logical gates including AND, OR, and NOT gates have been realized through temporal manipulation on the localized polariton condensate [5]. Our work allows for revealing the novel mechanisms of room-temperature polariton condensation and manipulating the fundamental processes in strongly coupled systems, which will be beneficial towards basic studies and potential applications of polariton systems.
[1] Fei Chen, Hang Zhou, Ziyu Ye, et al., Phys. Rev. B 106, L020301 (2022).
[2] Ziyu Ye, Fei Chen, Hang Zhou, et al., Phys. Rev. B 107, L060303 (2023).
[3] Fei Chen, Hang Zhou, Hui Li*, et al., Nano Lett. 22, 2023 (2022).
[4] Fei Chen, Hui Li*, Hang Zhou, et al., Phys. Rev. Lett. 129, 057402 (2022).
[5] Hui Li*, Fei Chen, Haoyuan Jia, et al., Nat. Photon. 18, 864 (2024).
About the speaker
About the speaker
Prof. Hui Li has obtained her PhD from Max Planck Institute for Quantum Optics (MPQ) and Ludwig Maximilian University of Munich (LMU), Germany, within the group of attosecond science lead by Prof. Ferenc Krausz (The Nobel Physics Prize winner in 2023). She joined the State Key Laboratory of Precision Spectroscopy at East China University in 2016. Her current research interests lie in the ultrafast dynamics in molecular, nano- and micro-systems. She has developed various advanced techniques for ultrafast light field manipulation and high-precision time-resolved measurements. She is one of the recipients of the Women in Ultrafast Science Global Award (2024).
Date & Location
Date & Location
The event will be taking place online on the 17th of October 2024 at 10:00 CET. Please join using this link.
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