High-harmonic generation at the nanoscale boosted by bound states in the continuum
Authors: Carletti L., Kruk SS., Bogdanov AA., De Angelis C., Kivshar Y.
Autors Affiliation: Univ Padua, Dept Informat Engn, I-35131 Padua, Italy; Australian Natl Univ, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia; ITMO Univ, St Petersburg 197101, Russia; Univ Brescia, Dept Informat Engn, I-25123 Brescia, Italy; Natl Inst Opt INO CNR, I-25123 Brescia, Italy
Abstract: Recent progress in nanoscale optics is driven by the physics of electric and magnetic resonances supported by high-index dielectric nanoparticles. Here, we exploit optical bound states in the continuum in a subwavelength particle enhanced by an engineered substrate undergoing an epsilon-near-zero transition from an insulator to a conductor, and uncover how to boost dramatically high-order parametric nonlinear effects. Our strategy makes feasible an observation of a variety of multistep cascaded and multifrequency nonlinear effects in an individual subwavelength resonator. This would expand substantially the range of applications of Mie-resonant dielectric metaphotonics for highly efficient subwavelength optical circuitry, nonlinear metadevices, ultrasensitive hyperspectral sensing, and quantum nanophotonics.
Journal/Review: PHYSICAL REVIEW RESEARCH
Volume: 1 (2) Pages from: 023016-1 to: 023016-7
KeyWords: ENHANCED 2ND-HARMONIC GENERATION; DIELECTRIC NANOPARTICLES; META-OPTICS; RESONANCES; FIELD; PEROVSKITE; SILICON; SIDOI: 10.1103/PhysRevResearch.1.023016Citations: 27data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here