Schematic of the OAM measurement with two-color strong-field ionization experiment. (IMAGE)
Caption
a Layout showing the preparation of the two-color co-rotating circular light fields with the 800-nm light pulses (red) and 400-nm light pulses (blue). A Mach–Zehnder interferometer scheme is used. BBO, barium borate crystal; DM, dichroic mirror; QWP, quarter-wave plate; SPP, spiral phase plate. b Illustration of the strong-field ionization detection experiment. The generated two-color co-rotating circular field interacts with the supersonic argon atom gas jet inside of COLTRIMS apparatus. c Diagram of the electric field vectors of the 800-nm circular field (red), 400-nm circular field (blue), and two-color co-rotating circular field (purple), respectively. For each laser field, a 3D polarization profile (left) and a 2D Lissajous figure of its electric field in transverse plane (right) are given. The deflected angle of peak electric field of the two-color field, ξm, is related with that in Fig. 2a. d The simulated light spatial profiles in the focal plane. The top panels show the normalized intensity distributions and the bottom panels show the phase structure of x-component electric field. The white circles enclose the regions (exclude the singularities in b4 and b5), where the light intensity is larger than 0.5Im (Im, the peak intensity of focal light field).
Credit
by Yiqi Fang, Zhenning Guo, Peipei Ge, Yankun Dou, Yongkai Deng, Qihuang Gong, and Yunquan Liu
Usage Restrictions
Credit must be given to the creator.
License
CC BY