Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide

doi:10.1088/1674-1056/ab3438

中国物理B ›› 2019, Vol. 28 ›› Issue (9): 94207-094207.doi: 10.1088/1674-1056/ab3438

所属专题： SPECIAL TOPIC — Strong-field atomic and molecular physics

• SPECIAL TOPIC-Strong-field atomic and molecular physics • 上一篇下一篇

Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide

Hong-Jing Liang(梁红静), Xin Fan(范鑫), Shuang Feng(冯爽), Li-Yu Shan(单立宇), Qing-Hua Gao(高庆华), Bo Yan(闫博), Ri Ma(马日), Hai-Feng Xu(徐海峰)

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

收稿日期:2019-05-27 修回日期:2019-06-24 出版日期:2019-09-05 发布日期:2019-09-05
通讯作者: Ri Ma, Hai-Feng Xu E-mail:rma@jlu.edu.cn;xuhf@jlu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91750104, 11534004, 11874179, 11127403, 11474130) and the Natural Science Foundation of Jilin Province, China (Grant No. 20180101289JC).

Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide

Hong-Jing Liang(梁红静), Xin Fan(范鑫), Shuang Feng(冯爽), Li-Yu Shan(单立宇), Qing-Hua Gao(高庆华), Bo Yan(闫博), Ri Ma(马日), Hai-Feng Xu(徐海峰)

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

Received:2019-05-27 Revised:2019-06-24 Online:2019-09-05 Published:2019-09-05
Contact: Ri Ma, Hai-Feng Xu E-mail:rma@jlu.edu.cn;xuhf@jlu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91750104, 11534004, 11874179, 11127403, 11474130) and the Natural Science Foundation of Jilin Province, China (Grant No. 20180101289JC).

摘要/Abstract

摘要：

We investigate experimentally multi-orbital effects in high-order harmonic generation (HHG) from aligned CO₂ and N₂O molecules by intense femtosecond laser fields with linear and elliptical polarizations. For either of the aligned molecules, a minimum in the harmonic spectrum is observed, the position of which shifts to lower-order harmonics when decreasing the intensity or increasing the ellipticity of the driving laser. This indicates that the minimum originates from the dynamic interference of different channels, of which the tunneling ionization and recombination are contributed via different molecular orbitals. The results show that both the highest occupied molecular orbital (HOMO) and low-lying HOMO-2 in CO₂ (or HOMO-1 in N₂O) contribute to the molecular HHG in both linearly and elliptically polarized strong laser fields. Our study would pave a way for understanding multi-electron dynamics from polyatomic molecules irradiated by strong laser fields.

关键词: high-order harmonic generation, aligned molecule, multi-orbital effect, dynamic interference

Abstract:

Key words: high-order harmonic generation, aligned molecule, multi-orbital effect, dynamic interference

中图分类号: (Frequency conversion; harmonic generation, including higher-order harmonic generation)

42.65.Ky

33.80.-b (Photon interactions with molecules) 33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

梁红静, 范鑫, 冯爽, 单立宇, 高庆华, 闫博, 马日, 徐海峰. Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide[J]. 中国物理B, 2019, 28(9): 94207-094207.

Hong-Jing Liang(梁红静), Xin Fan(范鑫), Shuang Feng(冯爽), Li-Yu Shan(单立宇), Qing-Hua Gao(高庆华), Bo Yan(闫博), Ri Ma(马日), Hai-Feng Xu(徐海峰). Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide[J]. Chin. Phys. B, 2019, 28(9): 94207-094207.

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Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide

Quantum interference of multi-orbital effects in high-harmonic spectra from aligned carbon dioxide and nitrous oxide

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