Current research direction:

(1) Micro-nano optoelectronics and solid-state quantum systems. By manipulating the environment such as light and acoustic fields using micro-nano structures, we study and control the coupling and conversion of quantum states and quantum information between different physical degrees of freedom in the interaction between light and matter, thereby constructing integrated quantum devices and quantum networks. (2) Device design and fabrication of new semiconductor materials. The new semiconductors offer a wealth of physical properties such as electricity, light, sound, and magnetism, providing a solution to the problems of poor controllability and low integration scale of traditional quantum light sources. The design and fabrication of corresponding devices not only help explore and understand the physical mechanisms in the new materials, but also expand the solid-state quantum system towards higher controllability, multiple degrees of freedom, and large-scale integration.

Current research topics and prospects:

Currently, I am the principal investigator of the National Natural Science Foundation Talent Project, the CAS Talent Project, and the National Natural Science Foundation General Project; as the project leader, I have undertaken the National Natural Science Foundation Major Project and the CAS Young Team Program Project; as a key member, I have participated in the Ministry of Science and Technology Key Research and Development Program, etc.

Publish:

Y. Yuan*, C. Qian*, L. Yang, X.-C. Ru, Y. Li, J. Yang, B. Fu, S. Yan, H. Li, Z. Zuo, C. Wang†, X. Hu, H.-B. Yao, K. Jin, Q. Gong, X. Xu†, Robust Purcell Effect of CsPbI3 Quantum Dots Using Nonlocal Plasmonic Metasurfaces, Physical Review Letters 134(24), 243804 (2025) (Editors' Suggestion)

C. Qian†, V. Villafañe, M. Schalk, G. V. Astakhov, U. Kentsch, M. Helm, P. Soubelet, A. V. Stier, J. J. Finley†, Emitter-Optomechanical Interaction in Ultra-High-Q hBN Nanocavities, APL Quantum 2(2), 026113 (2025) (Featured Article)

R. Zhu*, C. Qian*, S. Xiao*, J. Yang, S. Yan, H. Liu, D. Dai, H. Li, L. Yang, X. Chen, Y. Yuan, D. Dai, Z. Zuo†, H. Ni, Z. Niu, C. Wang†, K. Jin, Q. Gong, X. Xu†, Full Polarization Control of Photons with Evanescent Wave Coupling in the Ultra Subwavelength Gap of Photonic Molecules, Light: Science & Applications 14, 114 (2025)

C. Qian†, V. Villafañe, P. Soubelet, A. V. Stier, J. J. Finley†, Couplings between Photons and Ensemble of Emitters in a High-Q Cavity at Mesoscopic Excitation Levels, IEEE Journal of Selected Topics in Quantum Electronics 31(5), 2900108 (2025)

C. Qian†, V. Villafañe, P. Soubelet, P. Ji, A. V. Stier, J. J. Finley†, Probing Dark Excitons in Monolayer MoS2 by Nonlinear Two-Photon Spectroscopy, Physical Review Letters 133, 086902 (2024)

C. Qian†, M. Troue, J. Figueiredo, P. Soubelet, V. Villafañe, J. Beierlein, S. Klembt, A. V. Stier, S. Höfling, A. W. Holleitner, J. J. Finley†, Lasing of Moiré Trapped MoSe2/WSe2 Interlayer Excitons Coupled to a Nanocavity, Science Advances 10, eadk6359 (2024)

P. Ji, C. Qian†, J. J. Finley†, S. Yang†, Thickness Insensitive Nanocavities for 2D Heterostructures Using Photonic Molecules, Nanophotonics 12, 3501-3510 (2023)

C. Qian*†, V. Villafañe*, M. M. Petrić, P. Soubelet, A. V. Stier, J. J. Finley†, Coupling of MoS2 Excitons with Lattice Phonons and Cavity Vibrational Phonons in Hybrid Nanobeam Cavities, Physical Review Letters 130, 126901 (2023)

C. Qian†, V. Villafañe, M. Schalk, G. V. Astakhov, U. Kentsch, M. Helm, P. Soubelet, N. P. Wilson, R. Rizzato, S. Mohr, A. W. Holleitner, D. B. Bucher, A. V. Stier, J. J. Finley†, Unveiling the Zero-Phonon Line of the Boron Vacancy Center by Cavity-Enhanced Emission, Nano Letters 22, 5137-5142 (2022)

C. Qian†, V. Villafañe, P. Soubelet, A. Hötger, T. Taniguchi, K. Watanabe, N. P. Wilson, A. V. Stier, A. W. Holleitner, J. J. Finley†, Nonlocal Exciton-Photon Interactions in Hybrid High-Q Beam Nanocavities with Encapsulated MoS2 Monolayers, Physical Review Letters 128, 237403 (2022)

J. Yang*, C. Qian*, X. Xie, K. Peng, S. Wu, F. Song, S. Sun, J. Dang, Y. Yu, S. Shi, J. He, M. J. Steer, I. G. Thayne, B.-B. Li, F. Bo, Y.-F. Xiao, K. Jin, C. Gu, X. Xu†, Diabolical Points in Coupled Active Cavities with Quantum Emitters, Light: Science & Applications 9, 6 (2020)

C. Qian, X. Xie, J. Yang, X. Xu†, A Cratered Photonic Crystal Cavity Mode for Nonlocal Exciton-Photon Interactions, Advanced Quantum Technologies 3, 1900024 (2020)

Y. Yu*, J. Dang*, C. Qian*, S. Sun, K. Peng, X. Xie, S. Wu, F. Song, J. Yang, S. Xiao, L. Yang, Y. Wang, X. Shan, M. A. Rafiq, B.-B. Li, X. Xu†, Many-Body Effect of Mesoscopic Localized States in MoS2 Monolayer, Physical Review Materials 3, 051001 (2019)

C. Qian, X. Xie, J. Yang, K. Peng, S. Wu, F. Song, S. Sun, J. Dang, Y. Yu, M. J. Steer, I. G. Thayne, K. Jin, C. Gu, X. Xu†, Enhanced Strong Interactions between Nanocavities and p-shell Excitons Beyond the Dipole Approximation, Physical Review Letters 122, 087401 (2019)

C. Qian, S. Wu, F. Song, K. Peng, X. Xie, J. Yang, S. Xiao, M. J. Steer, I. G. Thayne, C. Tang, Z. Zuo, K. Jin, C. Gu, X. Xu†, Two-Photon Rabi Splitting in a Coupled System of a Nanocavity and Exciton Complexes, Physical Review Letters 120, 213901 (2018)

Training of graduate students:

We plan to recruit 2 to 3 graduate students each year. At the same time, we welcome postdoctoral researchers with relevant backgrounds to join us. We also welcome undergraduate students who are interested to come for an internship.