Recently emerged new field of all-dielectric resonant metaphotonics (also called “Mie-tronics” aims at the manipulation of strong optically-induced electric and magnetic Mie-type resonances in dielectric nanostructures with high refractive index. Unique advantages of dielectric resonant nanostructures over their metallic counterparts are low dissipative losses combined with strong enhancement of both electric and magnetic fields, thus providing competitive alternatives for plasmonics including optical nanoantennas, nanolasers, biosensors, and metasurfaces.

Importantly, high-index dielectric nanoparticles supporting multipolar Mie resonances are building blocks of advanced metamaterials. By combing both electric and magnetic multipolar modes, one can modify far-field radiation patterns and also localize the electromagnetic energy in open resonators by employing the physics of bound states in the continuum.  Changing the resonator parameters or combining the resonators into a planar geometry of metasurfaces allow achieving much higher values of the Q factor.

This mini-review highlights some recent advances in the field of all-dielectric Mie-resonant metaphotonics driven by the development of high-Q dielectric structures for nonlinear nanophotonics, nanoscale lasing, and efficient sensing applications.  

Example of 310 nm nanolaser based on lead halide perovskite CsPbBr₃ nanocuboid and operating at room temperature. Multipole decomposition of the lasing mode demonstrates the dominant contribution of the third-order magnetic dipolar Mie mode.

P.Tonkaev, Y.Kivshar
JETP Letters 112, issue10 (2020)