Subwavelength dielectric resonators for nonlinear nanophotonics

Kirill Koshelev, Sergey Kruk, Elizaveta Melik-Gaykazyan, Jae Hyuck Choi, Andrey Bogdanov, Hong Gyu Park, Yuri Kivshar

Research output: Contribution to journalArticlepeer-review

588 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)288-292
Number of pages5
Issue number6475
Publication statusPublished - 2020 Jan 17

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© 2020 American Association for the Advancement of Science. All rights reserved.

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