Steering ultrafast electron dynamics with well-controlled laser fields is very important for generation of intense supercontinuum radiation.It can be achieved through coherent control of the symmetry of the interactio...Steering ultrafast electron dynamics with well-controlled laser fields is very important for generation of intense supercontinuum radiation.It can be achieved through coherent control of the symmetry of the interaction between strong-field laser fields and a metal nanotip.We employ a scheme of two-color laser pulses combined with a weak static field to realize the control of a single quantum path to generate high harmonic generation from a single solid-state nanoemitter.Moreover,a smooth and ultrabroad supercontinuum in the extreme ultraviolet region is obtained,which can produce a single attosecond pulse.Our findings are beneficial for efficient generation of isolated sub-100 as XUV pulses from solid-state sources.展开更多
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....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.展开更多
基金Supported by the National Key Research and Development Program of China(Grant Nos.2019YFA0307700 and 2016YFA0401100)the National Natural Science Foundation of China(Grant Nos.11774215,11674209,91950101,11947243,11334009,11425414,and11947080)+3 种基金Sino-German Mobility Programme(Grant No.M-0031)Department of Education of Guangdong Province(Grant No.2018KCXTD011)High Level University Projects of the Guangdong Province(Mathematics,Shantou University)the Open Fund of the State Key Laboratory of High Field Laser Physics(SIOM)。
文摘Steering ultrafast electron dynamics with well-controlled laser fields is very important for generation of intense supercontinuum radiation.It can be achieved through coherent control of the symmetry of the interaction between strong-field laser fields and a metal nanotip.We employ a scheme of two-color laser pulses combined with a weak static field to realize the control of a single quantum path to generate high harmonic generation from a single solid-state nanoemitter.Moreover,a smooth and ultrabroad supercontinuum in the extreme ultraviolet region is obtained,which can produce a single attosecond pulse.Our findings are beneficial for efficient generation of isolated sub-100 as XUV pulses from solid-state sources.
基金supported by the National Natural Science Foundation of China(Nos.11774215,91950101,and12074240)Sino-German Mobility Programme(No.M-0031)+2 种基金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)。
文摘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.
