Login / Signup

Subwavelength dielectric resonators for nonlinear nanophotonics.

Kirill KoshelevSergey S KrukElizaveta V Melik-GaykazyanJae-Hyuck ChoiAndrey A BogdanovHong-Gyu ParkYuri S Kivshar
Published in: Science (New York, N.Y.) (2020)
Subwavelength optical resonators made of high-index dielectric materials provide efficient ways to manipulate light at the nanoscale through mode interferences and enhancement of both electric and magnetic fields. Such Mie-resonant dielectric structures have low absorption, and their functionalities are limited predominantly by radiative losses. We implement a new physical mechanism for suppressing radiative losses of individual nanoscale resonators to engineer special modes with high quality factors: optical bound states in the continuum (BICs). We demonstrate that an individual subwavelength dielectric resonator hosting a BIC mode can boost nonlinear effects increasing second-harmonic generation efficiency. Our work suggests a route to use subwavelength high-index dielectric resonators for a strong enhancement of light-matter interactions with applications to nonlinear optics, nanoscale lasers, quantum photonics, and sensors.
Keyphrases
  • atomic force microscopy
  • high resolution
  • high speed
  • physical activity
  • mental health
  • molecularly imprinted
  • single molecule