Future technologies underpinning high-performance optical communications, ultrafast computations and compact biosensing will rely on densely packed reconfigurable optical circuitry based on nanophotonics. For many years, plasmonics was considered as the only available platform for nanoscale optics, but the recently emerged novel field of Mie resonant metaphotonics provides more practical alternatives for nanoscale optics by employing resonances in high-index dielectric nanoparticles and structures. In this mini-review we highlight some recent trends in the physics of dielectric Mie-resonant nanostructures with high quality factor (Q factor) for efficient spatial and temporal control of light by employing multipolar resonances and the bound states in the continuum. We discuss a few applications of these concepts to nonlinear optics, nanolasers, subwavelength waveguiding, and sensing.

支持高性能光通信，超快速计算和紧凑型生物传感的未来技术将依赖于基于纳米光子学的密集封装的可重构光学电路。多年来，等离激元学被认为是纳米光学的唯一可用平台，但是最近出现的米氏共振超光子学的新领域通过在高折射率介电纳米粒子和结构中采用共振，为纳米级光学提供了更实用的替代方法。在此小型审查中，我们重点介绍了通过使用多极共振和连续态中的束缚态，具有高品质因数（Q因子）的介电米氏谐振纳米结构的物理特性的一些最新趋势，从而可以有效地进行光的空间和时间控制。我们讨论了这些概念在非线性光学，纳米激光，亚波长波导和传感中的一些应用。