High-harmonic generation at the nanoscale boosted by bound states in the continuum

Anno: 2019

Autori: Carletti L., Kruk SS., Bogdanov AA., De Angelis C., Kivshar Y.

Affiliazione autori: 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.

Giornale/Rivista: PHYSICAL REVIEW RESEARCH

Volume: 1 (2)      Da Pagina: 023016-1  A: 023016-7

Parole chiavi: ENHANCED 2ND-HARMONIC GENERATION; DIELECTRIC NANOPARTICLES; META-OPTICS; RESONANCES; FIELD; PEROVSKITE; SILICON; SI
DOI: 10.1103/PhysRevResearch.1.023016

Citazioni: 52
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-09-25
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