@inproceedings{1f2df6a931764fb0be163d42af45c3b8,
title = "Observation of highly efficient second-harmonic generation at the nanoscale driven by bound states in the continuum",
abstract = "Recent developments in the physics of Mie-resonant high-index dielectric nanostructures suggested a promising pathway to improve efficiencies of the nonlinear light conversion beyond the limits imposed by plasmonics. Here, we employ the concept of bound states in the continuum to experimentally demonstrate a sharp enhancement of the second-harmonic generation efficiency at localized states formed via destructive interference of two leaky modes. For an AlGaAs subwavelength disk with optimized parameters, pumped with a structured light and placed on an engineered multilayered substrate, we observe the record-high conversion efficiency compared to the previous demonstrations with isolated subwavelength resonators.",
keywords = "Bound states in the continuum, Meta-optics, Nanoantenna, Second-harmonic generation, Structured light, Subwavelength resonator",
author = "Kirill Koshelev and Sergey Kruk and Elizaveta Melik-Gaykazyan and Choi, \{Jae Hyuck\} and Andrey Bogdanov and Park, \{Hong Gyu\} and Yuri Kivshar",
note = "Publisher Copyright: {\textcopyright} 2020 SPIE.; High Contrast Metastructures IX 2020 ; Conference date: 03-02-2020 Through 06-02-2020",
year = "2020",
doi = "10.1117/12.2544231",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Chang-Hasnain, \{Connie J.\} and Andrei Faraon and Weimin Zhou",
booktitle = "High Contrast Metastructures IX",
address = "United States",
}