Hong-jing Liang, Qiao-xia Wang, Xin Fan, Li-yu Shan, Shuang Feng, Bing Yan, Ri Ma, Hai-feng Xu. High-order Harmonic Generation of Aligned Acetylene in Elliptically Polarized Strong Laser Fields[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 471-476. doi: 10.1063/1674-0068/31/cjcp1805117
Citation: Hong-jing Liang, Qiao-xia Wang, Xin Fan, Li-yu Shan, Shuang Feng, Bing Yan, Ri Ma, Hai-feng Xu. High-order Harmonic Generation of Aligned Acetylene in Elliptically Polarized Strong Laser Fields[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 471-476. doi: 10.1063/1674-0068/31/cjcp1805117

High-order Harmonic Generation of Aligned Acetylene in Elliptically Polarized Strong Laser Fields

doi: 10.1063/1674-0068/31/cjcp1805117
  • Received Date: 2018-05-25
  • We perform an experimental study on high-order harmonic generation (HHG) of aligned acetylene molecules induced by a 35-fs 800-nm strong laser field, by using a home-built HHG spectrometer. It is observed that the molecular HHG probability declines with increasing the laser ellipticity, which is in consistence with the deduction from the well-known tunneling-plus-rescattering scenario. By introducing a weak femtosecond laser pulse to nonadiabatically align the molecules, we investigated the molecular orbital effect on the HHG in both linearly and elliptically polarized driving laser fields. The results show that the harmonic intensity is maximum for the molecular axis aligned perpendicularly to the laser electric field. It indicates that both the highest occupied molecular orbitals (HOMO) and HOMO-1 contribute to the strong-field HHG of acetylene molecules. Our study should pave the way for understanding the interaction of molecules with ultrafast strong laser fields.
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High-order Harmonic Generation of Aligned Acetylene in Elliptically Polarized Strong Laser Fields

doi: 10.1063/1674-0068/31/cjcp1805117

Abstract: We perform an experimental study on high-order harmonic generation (HHG) of aligned acetylene molecules induced by a 35-fs 800-nm strong laser field, by using a home-built HHG spectrometer. It is observed that the molecular HHG probability declines with increasing the laser ellipticity, which is in consistence with the deduction from the well-known tunneling-plus-rescattering scenario. By introducing a weak femtosecond laser pulse to nonadiabatically align the molecules, we investigated the molecular orbital effect on the HHG in both linearly and elliptically polarized driving laser fields. The results show that the harmonic intensity is maximum for the molecular axis aligned perpendicularly to the laser electric field. It indicates that both the highest occupied molecular orbitals (HOMO) and HOMO-1 contribute to the strong-field HHG of acetylene molecules. Our study should pave the way for understanding the interaction of molecules with ultrafast strong laser fields.

Hong-jing Liang, Qiao-xia Wang, Xin Fan, Li-yu Shan, Shuang Feng, Bing Yan, Ri Ma, Hai-feng Xu. High-order Harmonic Generation of Aligned Acetylene in Elliptically Polarized Strong Laser Fields[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 471-476. doi: 10.1063/1674-0068/31/cjcp1805117
Citation: Hong-jing Liang, Qiao-xia Wang, Xin Fan, Li-yu Shan, Shuang Feng, Bing Yan, Ri Ma, Hai-feng Xu. High-order Harmonic Generation of Aligned Acetylene in Elliptically Polarized Strong Laser Fields[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 471-476. doi: 10.1063/1674-0068/31/cjcp1805117
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