Materials with a vanishing dielectric constant provide an ideal platform for achieving plasmon-enhanced light-matter interactions and are widely employed in various cutting-edge nonlinear photonics applications.In thi...Materials with a vanishing dielectric constant provide an ideal platform for achieving plasmon-enhanced light-matter interactions and are widely employed in various cutting-edge nonlinear photonics applications.In this study,we present the first experimental demonstration of extreme ultraviolet(XUV)plasmon-enhanced self-driven spectral modification using a submicrometric foil of aluminium.This is achieved through the excitation of widely tunable Ferrell-Berreman epsilon-near-zero resonances with extremely low absorption.Our angle-dependent measurements of spectral modulation enhancement,supported by theoretical analysis,reveal efficient spectral modification at peak intensities as low as 380 GW/cm2,which we attribute to ultrafast heating and saturation effects.These findings mark a breakthrough in the enhancement of typically weak nonlinearities in the XUV regime through nonlinear plasmonics,potentially paving the way for unprecedented tools for the manipulation and control of XUV radiation.展开更多
基金funded by the European Union-NextGenerationEU,Mission 4,Component 1,under the Italian Ministry of University and Research(MUR)National Innovation Ecosystem grant ECS00000041-VITALITY-CUP E13C22001060006supported by the Progetti di ricerca di Rilevante Interesse Nazionale(PRIN)of the Italian Ministry of University and Research PHOTO(PHOtonics Terahertz devices based on tOpological materials)2020RPEPNH,TransientMeta(Light-programmed two-dimensional meta-holograms for integrated neuromorphic computing)2022N738SA-CUP E53D23001780006,and NOTBAD(Nonlinear Operando Tools for BAtteries Diagnostics)P2022E2PBB-CUPs:E53D23018310001 and B53D23028460001+1 种基金financial support under the National Recovery and Resilience Plan(NRRP),Mission 4,Component 2,Investment 1.1,funded by the European Union-NextGenerationEU-Project Title“Symmetry-broken HEterostructurEs for Photovoltaic applications-SHEEP”-CUP B53D23028580001-Grant Assignment Decree No.1409 adopted on 14-09-2022 by the Italian Ministry of University and Research(MUR)support of EU HORIZON funding programme through grant GA-101120832.
文摘Materials with a vanishing dielectric constant provide an ideal platform for achieving plasmon-enhanced light-matter interactions and are widely employed in various cutting-edge nonlinear photonics applications.In this study,we present the first experimental demonstration of extreme ultraviolet(XUV)plasmon-enhanced self-driven spectral modification using a submicrometric foil of aluminium.This is achieved through the excitation of widely tunable Ferrell-Berreman epsilon-near-zero resonances with extremely low absorption.Our angle-dependent measurements of spectral modulation enhancement,supported by theoretical analysis,reveal efficient spectral modification at peak intensities as low as 380 GW/cm2,which we attribute to ultrafast heating and saturation effects.These findings mark a breakthrough in the enhancement of typically weak nonlinearities in the XUV regime through nonlinear plasmonics,potentially paving the way for unprecedented tools for the manipulation and control of XUV radiation.
