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 journalArticle

15 Citations (Scopus)

Abstract

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
JournalScience
Volume367
Issue number6475
DOIs
Publication statusPublished - 2020 Jan 17

ASJC Scopus subject areas

  • General

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    Koshelev, K., Kruk, S., Melik-Gaykazyan, E., Choi, J. H., Bogdanov, A., Park, H. G., & Kivshar, Y. (2020). Subwavelength dielectric resonators for nonlinear nanophotonics. Science, 367(6475), 288-292. https://doi.org/10.1126/science.aaz3985