Introduction

Xu-Chen Nie is a lecturer at the Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics. He received his bachelor’s degree in applied physics and Ph.D. degree in physics from Beijing University of Technology in 2013 and 2019. His major research currently focuses on ultrafast time-resolved laser spectroscopy and microscopy, photoinduced phase transitions, and ultrafast carrier and coherent phonon dynamics in 2D semiconductors (such as TMDCs) and strongly correlated electronic systems (CDWs, TMOs, and high-temperature superconductors).

Educational background

2019-present, nanjing university of aeronautics and astronautics, international frontier science research institute, lecturer/master supervisor

2013-2019, beijing university of technology, institute of laser engineering, physics, ph.d

2009-2013, school of applied mathematics and physics, beijing university of technology, b.s

Research directions

pump detection ultrafast spectra; nonlinear spectra; ultrafast laser-regulated quantum states; ultrafast dynamics of non-equilibrium quasiparticles; coherent phonon dynamics.

Representative results

(1) X.-C. Nie, H.-Y. Song, X. Zhang, P. Gu, S.-B. Liu, F. Li, J.-Q. Meng, Y.-X. Duan, H. Y. Liu, Transient transition from free carrier metallic state to exciton insulating state in GaAs by ultrafast photoexcitation, New J. Phys. 20, 033015 (2018). *

(2) X.-C. Nie, H.-Y. Song, X. Zhang, S.-B. Liu, F. Li, L. Yue, J.-Q. Meng, Y.-X. Duan, L. Zhao, H. Y. Liu, Photoinduced two-step insulator-metal transition in Ti*4OR7 via ultrafast time-resolved optical reflectivity, Appl. Phys. Express 11, 095802 (2018).

(3) X.-C. Nie, H.-Y. Liu, X. Zhang, C.-Y. Jiang, S.-Z. Zhao, Q.-P. Zhao, F. Li, L. Yue, J.-Q. Meng, Y.-X. Duan, S.-B. Liu, Exciton-phonon and exciton-exciton interactions in GaAs by time-resolved optical reflectivity, Results Phys. 12, 1089-1090 (2019). **

(4) X.-C. Nie, H.-Y. Song, F. Li, J.-Q. Meng, Y.-X. Duan, H.-Y. Liu, S.-B. Liu, Transient carrier dynamics of GaAs at room temperature, J. Appl. Phys. 128, 015706 (2020). **

(5) X.-C. Nie, H.-Y. Song, X. Zhang, Y. Wang, Q. Gao, L. Zhao, X.-J. Zhou, J.-Q. Meng, Y.-X. Duan, H.-Y. Liu, S.-B. Liu, Study of pseudogap and superconducting quasiparticle dynamics in Bi* *2Sr2CaCu2OR8+d by time-resolved optical reflectivity, Physica C 577, 1353710 (2020).

(6) H.-J. Shi, X.-C. Nie, Composite control for disturbed direct-driven surface-mounted permanent magnet synchronous generator with model prediction strategy, Meas. Control 54, 1015-1025 (2021).*

(7) X. Zhang, H.-Y. Song, X. C. Nie, S.-B. Liu, Y. Wang, C.-Y. Jiang, S,-Z. Zhao, G. Chen, J.-Q. Meng, Y.-X. Duan, H. Y. Liu, Ultrafast hot carrier dynamics of ZrTe*5 from time-resolved optical reflectivity, Phys Rev B 99, 125141 (2019).

(8) S. Z. Zhao, H.-Y. Song, L. L. Hu, T. Xie, H. Q. Luo, C.-Y. Jiang, X. Zhang, X.-C. Nie, J.-Q. Meng, Y.-X. Duan, S.-B. Liu, H.-Y. Xie, H. Y. Liu, Observation of soft Leggett mode in superconducting CaKFe***4As4, Phys. Rev. B 102, 144519 (2020).

(9) C.-Y. Jiang, H.-Y. Song, T. Xie, C. Liu, H. Q. Luo, S. Z. Zhao, X. Zhang, X.-C. Nie, J.-Q. Meng, Y.-X. Duan, H.Y. Liu, S.-B. Liu, Time-resolved study of pseudogap and superconducting quasiparticle dynamics in Ca**0.82The0.18Fe1-xNorxAs2, Chin. Phys. Latvian. 37, 067401 (2020).

(10) J. Zheng, S. Yang, X. Nie, L. Li, All-polarization-maintaining passively mode-locked erbium-doped fiber laser based on a WDM-isolator-tap hybrid device, J. Russ. Laser Res. 42, 82-86 (2021).*