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Acta Optica Sinica, Volume. 42, Issue 21, 2102002(2022)

Nonsequential Double Ionization of Molecules in Counter-Rotating Two-Color Circularly Polarized Laser Fields

Zhen Guo, Lihua Bai*, Keying Liu, and Yanwen Shen
Author Affiliations
  • Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, China
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    Figures & Tables(7)
    Yield of NSDI for N2 at different laser wavelengths with different CRTC laser intensities

    Fig. 1. Yield of NSDI for N2 at different laser wavelengths with different CRTC laser intensities

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    Electron trajectories at different laser wavelengths for two laser intensities. Electron trajectories of combined fields with wavelengths of (a) 390 nm and 780 nm, (b) 700 nm and 1400 nm, and (c) 1000 nm and 2000 nm, respectively, in CRTC laser field with laser intensity of 2×1014 W/cm2; electron trajectories of combined fields with wavelengths of (d) 390 nm and 780 nm, (e) 700 nm and 1400 nm, and (f) 1000 nm and 2000 nm, respectively, in CRTC laser field with laser intensity of 5×1014 W/cm2

    Fig. 2. Electron trajectories at different laser wavelengths for two laser intensities. Electron trajectories of combined fields with wavelengths of (a) 390 nm and 780 nm, (b) 700 nm and 1400 nm, and (c) 1000 nm and 2000 nm, respectively, in CRTC laser field with laser intensity of 2×1014 W/cm2; electron trajectories of combined fields with wavelengths of (d) 390 nm and 780 nm, (e) 700 nm and 1400 nm, and (f) 1000 nm and 2000 nm, respectively, in CRTC laser field with laser intensity of 5×1014 W/cm2

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    Momentum distributions of N2 at different laser wavelengths in CRTC laser fields. Momentum distributions of N2 of combined fields with wavelengths of (a) 390 nm and 780 nm, (b) 500 nm and 1000 nm, and (c) 800 nm and 1600 nm, respectively, with the laser intensity of 2.4×1014 W/cm2; momentum distributions of N2 with laser intensities of (d)-(f) 3×1014 W/cm2 and (g)-(i) 4×1014 W/cm2 with laser wavelengths corresponding to Fig. 3(a)-(c), respectively

    Fig. 3. Momentum distributions of N2 at different laser wavelengths in CRTC laser fields. Momentum distributions of N2 of combined fields with wavelengths of (a) 390 nm and 780 nm, (b) 500 nm and 1000 nm, and (c) 800 nm and 1600 nm, respectively, with the laser intensity of 2.4×1014 W/cm2; momentum distributions of N2 with laser intensities of (d)-(f) 3×1014 W/cm2 and (g)-(i) 4×1014 W/cm2 with laser wavelengths corresponding to Fig. 3(a)-(c), respectively

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    Ratio of electrons ionized by two ionization mechanisms at different wavelengths in CRTC laser fields. (a) Laser intensity is 2.4×1014 W/cm2; (b) laser intensity is 3×1014 W/cm2; (c) laser intensity is 4×1014 W/cm2

    Fig. 4. Ratio of electrons ionized by two ionization mechanisms at different wavelengths in CRTC laser fields. (a) Laser intensity is 2.4×1014 W/cm2; (b) laser intensity is 3×1014 W/cm2; (c) laser intensity is 4×1014 W/cm2

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    Momentum distributions of N2 at different wavelengths for RII ionization mechanism in CRTC laser fields. Momentum distributions of combined fields with wavelengths of (a) 400 nm and 800 nm, (b) 500 nm and 1000 nm, and (c) 600 nm and 1200 nm, respectively, with laser intensity of 5×1014 W/cm2; momentum distributions of combined fields with wavelengths of (d) 400 nm and 800 nm, (e) 500 nm and 1000 nm, and (f) 600 nm and 1200 nm, respectively, with laser intensity of 7×1014 W/cm2

    Fig. 5. Momentum distributions of N2 at different wavelengths for RII ionization mechanism in CRTC laser fields. Momentum distributions of combined fields with wavelengths of (a) 400 nm and 800 nm, (b) 500 nm and 1000 nm, and (c) 600 nm and 1200 nm, respectively, with laser intensity of 5×1014 W/cm2; momentum distributions of combined fields with wavelengths of (d) 400 nm and 800 nm, (e) 500 nm and 1000 nm, and (f) 600 nm and 1200 nm, respectively, with laser intensity of 7×1014 W/cm2

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    Return energy of N2 at different laser wavelengths in CRTC laser fields

    Fig. 6. Return energy of N2 at different laser wavelengths in CRTC laser fields

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    Time distributions of second electron ionization of N2 at fixed laser intensities in CRTC laser fields. Time distributions of combined fields with wavelengths of (a) 390 nm and 780 nm, (b) 600 nm and 1200 nm, and (c) 800 nm and 1600 nm, respectively, with laser intensity of 4×1014 W/cm2; time distributions of combined fields with wavelengths of (d) 390 nm and 780 nm, (e) 600 nm and 1200 nm, and (f) 800 nm and 1600 nm, respectively, with laser intensity of 7×1014 W/cm2

    Fig. 7. Time distributions of second electron ionization of N2 at fixed laser intensities in CRTC laser fields. Time distributions of combined fields with wavelengths of (a) 390 nm and 780 nm, (b) 600 nm and 1200 nm, and (c) 800 nm and 1600 nm, respectively, with laser intensity of 4×1014 W/cm2; time distributions of combined fields with wavelengths of (d) 390 nm and 780 nm, (e) 600 nm and 1200 nm, and (f) 800 nm and 1600 nm, respectively, with laser intensity of 7×1014 W/cm2

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    Zhen Guo, Lihua Bai, Keying Liu, Yanwen Shen. Nonsequential Double Ionization of Molecules in Counter-Rotating Two-Color Circularly Polarized Laser Fields[J]. Acta Optica Sinica, 2022, 42(21): 2102002

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    Paper Information

    Category: Atomic and Molecular Physics

    Received: Mar. 16, 2022

    Accepted: May. 23, 2022

    Published Online: Nov. 4, 2022

    The Author Email: Bai Lihua (lhbai@163.com)

    DOI:10.3788/AOS202242.2102002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology