Pursuing nanometer-scale nonlinear converters based on second harmonic generation(SHG)is a stimulating strategy for bio-sensing,on-chip optical circuits,and quantum information processing,but the light-conversion effi...Pursuing nanometer-scale nonlinear converters based on second harmonic generation(SHG)is a stimulating strategy for bio-sensing,on-chip optical circuits,and quantum information processing,but the light-conversion efficiency is still poor in such ultra-small dimensional nanostructures.Herein,we demonstrate a highly enhanced broadband frequency converter through a hybrid plasmonic–dielectric coupler,a ZnTe/ZnO single core–shell nanowire(NW)integrated with silver(Ag)nanoparticles(NPs).The NW dimension has been optimized to allow the engineering of dielectric resonances at both fundamental wave and second harmonic frequencies.Meanwhile,the localized surface plasmon resonances are excited in the regime between the Ag NPs and ZnTe/ZnO dielectric NW,as evidenced by plasmon-enhanced Raman scattering and resonant absorption.These two contributors remarkably enhance local fields and consequently support the strong broadband SHG outputs in this hybrid nanostructure by releasing stringent phase-matching conditions.The proposed nanoscale nonlinear optical converter enables the manipulation of nonlinear light–matter interactions toward the development of on-chip nanophotonic systems.展开更多
基金National Key Research and Development Program of China(2021YFB3600101)National Natural Science Foundation of China(91850112,U21A20503,U21A2071)+2 种基金Key-Area Research and Development Program of Guangdong Province(2020B010174002)Science and Technology Foundation of Guizhou Province(Qianke Foundation-ZK[2022]General 562)Master’s Degree Construction Project of Minzu Normal University of Xingyi(FZGHC2020-002).
文摘Pursuing nanometer-scale nonlinear converters based on second harmonic generation(SHG)is a stimulating strategy for bio-sensing,on-chip optical circuits,and quantum information processing,but the light-conversion efficiency is still poor in such ultra-small dimensional nanostructures.Herein,we demonstrate a highly enhanced broadband frequency converter through a hybrid plasmonic–dielectric coupler,a ZnTe/ZnO single core–shell nanowire(NW)integrated with silver(Ag)nanoparticles(NPs).The NW dimension has been optimized to allow the engineering of dielectric resonances at both fundamental wave and second harmonic frequencies.Meanwhile,the localized surface plasmon resonances are excited in the regime between the Ag NPs and ZnTe/ZnO dielectric NW,as evidenced by plasmon-enhanced Raman scattering and resonant absorption.These two contributors remarkably enhance local fields and consequently support the strong broadband SHG outputs in this hybrid nanostructure by releasing stringent phase-matching conditions.The proposed nanoscale nonlinear optical converter enables the manipulation of nonlinear light–matter interactions toward the development of on-chip nanophotonic systems.
