期刊
PHYSICAL REVIEW B
卷 106, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.L020301
关键词
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资金
- National Key R&D Program of China [2018YFA0306303, 2018YFA0306304]
- National Natural Science Fundation of China [92050105, 91950201, 11834004, 12174111]
- Science and Technology Commission of Shanghai Municipality, China [22ZR1419700]
- Fundamental Research Funds for the Central Universities [20720200074, YBNLTS2022-007]
- Interdisciplinary Program of Wuhan National High Magnetic Field Center [WHMFC202111]
- National Natural Science Foundation of China [62071301]
- NYU-ECNU Institute of Physics at NYU Shanghai
- Joint Physics Research Institute Challenge Grant
- Science and Technology Commission of Shanghai Municipality [19XD1423000, 22ZR1444600]
- NYU Shanghai Boost Fund
- China Foreign Experts Program [G2021013002L]
- NYU Shanghai Major-Grants Seed Fund
- Shanghai Pujiang Program [21PJ1403000]
This study visualizes the ultrafast buildup dynamics of room-temperature polariton condensation in a ZnO whispering gallery mode microcavity using the femtosecond angle-resolved spectroscopic imaging technique. The experimental observations are in quantitative agreement with the simulation results, which suggest that the scattering from exciton reservoir to lower polariton branches and the decay from these branches dominate the buildup process.
By using the femtosecond angle-resolved spectroscopic imaging technique, the ultrafast buildup dynamics of room-temperature polariton condensation is explicitly visualized in a ZnO whispering gallery mode microcavity. The buildup time of polariton condensation with respect to the arrival of the femtosecond pump pulse decreases with the increasing pump power and reaches a lower limit of about 4 ps. Simulation results by numerically solving the open-dissipative Gross-Pitaevskii equation coupled to an incoherent reservoir are in quantitative agreement with the experimental observations, showing that the scattering from exciton reservoir to the lower polariton branches and the decay from these branches dominate the buildup process.
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