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...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 109 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.展开更多
基金supported by the National Natural Science Foundation of China(U2341225 and 62375242).
文摘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 109 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.
