Giant photoinduced reflectivity modulation of nonlocal resonances in silicon metasurfaces

作     者：Andrea Tognazzi Paolo Franceschini Olga Sergaeva Luca Carletti Ivano Alessandri Giovanni Finco Osamu Takayama Radu Malureanu Andrei V.Lavrinenko Alfonso C.Cino Domenico de Ceglia Costantino De Angelis Andrea Tognazzi;Paolo Franceschini;Olga Sergaeva;Luca Carletti;Ivano Alessandri;Giovanni Finco;Osamu Takayama;Radu Malureanu;Andrei V.Lavrinenko;Alfonso C.Cino;Domenico de Ceglia;Costantino De Angelis

作者机构：University of PalermoDepartment of EngineeringPalermoItaly National Institute of Optics-National Research CouncilPalermoItaly University of BresciaDepartment of Information EngineeringPalermoItaly ITMO UniversitySchool of Physics and EngineeringSaint-PetersburgRussia ETH ZurichInstitute for Quantum ElectronicsDepartment of PhysicsOptical Nanomaterial GroupZurichSwitzerland Technical University of DenmarkDepartment of Electrical and Photonics EngineeringKongens LyngbyDenmark 

出 版 物：《Advanced Photonics》 (先进光子学（英文）)

年 卷 期：2023年第5卷第6期

页      面：83-91页

核心收录：

学科分类：070207[理学-光学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：the support of the Russian Science Foundation(Grant No.22-1200204) the financial support from the European Community through the“METAFAST”Project(H2020-FETOPEN-2018-2020,Grant No.899673) the Ministero Italiano dell’Istruzione(MIUR)through the“METEOR”Project(No.PRIN-2020,2020EYLJT_002) the European Union for the financial support through“FESR o FSE,PON Ricerca e Innovazione 2014-2020-DM 1062/2021” the University of Palermo through“Fondo Finalizzato alla Ricerca di Ateneo 2023.” financial support from the European Union,Nextgeneration EU,MUR D.M 737/2021 through the Project“Eurostart22”(No.PRJ-0988) 

主　　题：nonlocal metasurface nanophotonics ultrafast modulation Fano resonance 

摘      要：Metasurfaces offer a unique playground to tailor the electromagnetic field at subwavelength scale to control polarization,wavefront,and nonlinear *** of the optical response of these structures is challenging due to the nanoscale size of their constitutive elements.A long-sought solution to achieve tunability at the nanoscale is all-optical modulation by exploiting the ultrafast nonlinear response of ***,the nonlinear response of materials is inherently very weak,and,therefore,requires optical excitations with large values of *** show that by properly tuning the equilibrium optical response of a nonlocal metasurface,it is possible to achieve sizable variation of the photoinduced out-ofequilibrium optical response on the picosecond timescale employing fluences smaller than 250μJ∕cm^(2),which is 1 order of magnitude lower than previous studies with comparable reflectivity variations in silicon *** results pave the way to fast devices with large modulation amplitude.