1.State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
2.Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, China
Qiang Li (qiangli@zju.edu.cn)
收稿日期:2024-05-31,
修回日期:2025-02-26,
录用日期:2025-03-13,
网络出版日期:2025-04-27,
纸质出版日期:2025-06-30
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Free-space high-Q nanophotonics[J]. LSA, 2025,14(6):1504-1521.
Yu, J. B. et al. Free-space high-Q nanophotonics. Light: Science & Applications, 14, 1504-1521 (2025).
Free-space high-Q nanophotonics[J]. LSA, 2025,14(6):1504-1521. DOI: 10.1038/s41377-025-01825-x.
Yu, J. B. et al. Free-space high-Q nanophotonics. Light: Science & Applications, 14, 1504-1521 (2025). DOI: 10.1038/s41377-025-01825-x.
High-Q nanophotonic devices hold great importance in both fundamental research and engineering applications. Their ability to provide high spectral resolution and enhanced light-matter interactions makes them promising in various fields such as sensing
filters
lasing
nonlinear optics
photodetection
coherent thermal emission
and laser stealth. While Q-factors as large as 10
9
have been achieved experimentally in on-chip microresonators
these modes are excited through near-field coupling of optical fibers. Exciting high-Q modes via free-space light presents a significant challenge primarily due to the larger fabrication area and more lossy channels associated with free-space nanophotonic devices. This Review provides a comprehensive overview of the methods employed to achieve high-Q modes
highlights recent research progress and applications
and discusses the existing challenges as well as the prospects in the field of free-space high-Q nanophotonics.
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