摘要
High-harmonic generation in metasurfaces,driven by strong laser fields,has been widely studied.Compared to plasma,all-dielectric nanoscale metasurfaces possess larger nonlinearity response and higher damage threshold.Additionally,it can strongly localize the driven field,greatly enhancing its peak amplitude.In this work,we adopt a Fano resonant micronano structure with transmission peaks at different wavelengths and explore its nonlinear response by both single and twocolor pump fields.Compared to the high-order harmonics induced by the first resonant wavelength,the intensity of the high-harmonic radiation results is enhanced by one order of magnitude,when the metasurface is driven by various resonant and non-resonant wavelength combinations of a two-color field.
作者
Weifeng Yang
Yichong Lin
Xueyi Chen
Yuxuan Xu
Hongdan Zhang
Marcelo Ciappina
Xiaohong Song
杨玮枫;林奕崇;陈雪仪;徐雨萱;张宏丹;Marcelo Ciappina;宋晓红(School of Science,Hainan University,Haikou 570228,China;Research Center for Advanced Optics and Photoelectronics,Department of Physics,College of Science,Shantou University,Shantou 515063,China;Institute of Mathematics,Shantou University,Shantou 515063,China;Physics Program,Guangdong Technion-Israel Institute of Technology,Shantou 515063,China;Technion-Israel Institute of Technology,Haifa 32000,Israel)
基金
supported by the National Natural Science Foundation of China(Nos.11774215,91950101,and12074240)
Sino-German Mobility Programme(No.M-0031)
Department of Education of Guangdong Province(No.2018KCXTD011)
High Level University Projects of Guangdong Province(Mathematics,Shantou University)
Open Fund of the State Key Laboratory of High Field Laser Physics(SIOM)。
