Work

Near-Unity All-Optical Modulation of Third-Harmonic Generation with a Fano-Resonant Dielectric Metasurface

Year: 2024

Type: article

Abstract: We demonstrate all-optical modulation with a near-unity contrast of nonlinear light generation in a dielectric metasurface. We study third-harmonic generation from silicon Fano-resonant metasurfaces excited by femtosecond pulses at 1480 nm wavelength. We modulate the metasurface resonance by free carrier excitation induced by absorption of an 800 nm pump pulse, leading to up to 93% suppression of third-harmonic generation. Modulation and recovery occur on (sub)picosecond time scales. According to the Drude model, the pump-induced refractive index change blue-shifts the metasurface resonance away from the generation pulse, causing a strong modulation of third-harmonic conversion efficiency. The principle holds great promise for spatiotemporal programmability of nonlinear light generation.

Source: Nano Letters

DOI: 10.1021/acs.nanolett.4c03536

Authors: Falco Bijloo, Kevin Murzyn, Floor van Emmerik, Arie J. den Boef, Peter M. Kraus, A. Femius Koenderink

Institutions: Institute for Atomic and Molecular Physics, Advanced Research Center for Nanolithography (Netherlands), Vrije Universiteit Amsterdam, ASML (Netherlands)

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500

Funders: European Commission, Rijksuniversiteit Groningen, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, H2020 European Research Council