Abstract
High-order harmonic generation(HHG)of Ar atom in an elliptically polarized intense laser field is experimentally investigated in this work.Interestingly,the anomalous ellipticity dependence on the laser ellipticity(ε)in the lower-order harmonics is observed,specifically in the 13rd-order,which displays a maximal harmonic intensity at ε ≈ 0.1,rather than at ε=0 as expected.This contradicts the general trend of harmonic yield,which typically decreases with the increase of laser ellipticity.In this study,we attribute this phenomenon to the disruption of the symmetry of the wave function by the Coulomb effect,leading to the generation of a harmonic with high ellipticity.This finding provides valuable insights into the behavior of elliptically polarized harmonics and opens up a potential way for exploring new applications in ultrafast spectroscopy and light-matter interactions.
基金项目
国家自然科学基金(92250306)
国家自然科学基金(11974137)
国家自然科学基金(12304302)
National Key Program for Science and Technology Research and Development of China(2019YFA0307700)
吉林省自然科学基金(YDZJ202101ZYTS157)
吉林省自然科学基金(YDZJ202201ZYTS314)
Scientific Research Foundation of the Education Department of Jilin Province,China(JJKH20230283KJ)
NETL
NSTL
万方数据