@inproceedings{c70ac6b4eb85424aafbfc783ce60c237,
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 = "Funding Information: The authors acknowledge a financial support from the Australian Research Council (ARC), the Russian Foundation for Basic Research (18-32-20205), and the National Research Foundation of Korea (NRF) under grant no. 2018R1A3A3000666 funded by the Korean Government (MSIT). K.K. and A.B. acknowledge support from the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS“. 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",
}