Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses

doi:10.1088/1674-1056/24/7/073202

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 73202-073202.doi: 10.1088/1674-1056/24/7/073202

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses

钟慧英, 郭静, 张宏丹, 杜慧, 刘学深

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

收稿日期:2014-11-29 修回日期:2015-03-24 出版日期:2015-07-05 发布日期:2015-07-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174108, 11104108, and 11271158).

Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses

Zhong Hui-Ying (钟慧英), Guo Jing (郭静), Zhang Hong-Dan (张宏丹), Du Hui (杜慧), Liu Xue-Shen (刘学深)

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

Received:2014-11-29 Revised:2015-03-24 Online:2015-07-05 Published:2015-07-05
Contact: Guo Jing, Liu Xue-Shen E-mail:gjing@jlu.edu.cn;liuxs@jlu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174108, 11104108, and 11271158).

摘要/Abstract

摘要：

We present an efficient and realizable scheme for the generation of an ultrashort single attosecond (as) pulse from H atom with a 800-nm fundamental laser field combined with a terahertz (THz) field. The high-order harmonic generation (HHG) can be obtained by solving the time-dependent Schrödinger equation accurately and efficiently with time-dependent generalized pseudo-spectral (TDGPS) method. The result shows that the plateau of high-order harmonics is extended and the broadband spectra can be produced by the combined laser pulse, which can be explained by the corresponding ionization probability. The time–frequency analysis and semi-classical three-step model are also presented to further investigate this mechanism. Besides, by the superposition of the harmonics near the cutoff region, an isolated 133-as pulse can be obtained.

关键词: high-order harmonic generation, generalized pseudospectral method, attosecond pulse

Abstract:

Key words: high-order harmonic generation, generalized pseudospectral method, attosecond pulse

中图分类号: (Multiphoton ionization and excitation to highly excited states)

32.80.Rm

42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)

钟慧英, 郭静, 张宏丹, 杜慧, 刘学深. Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses[J]. 中国物理B, 2015, 24(7): 73202-073202.

Zhong Hui-Ying (钟慧英), Guo Jing (郭静), Zhang Hong-Dan (张宏丹), Du Hui (杜慧), Liu Xue-Shen (刘学深). Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses[J]. Chin. Phys. B, 2015, 24(7): 73202-073202.

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Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses

Quantum path control and isolated attosecond pulse generation in the combination of near-infrared and terahertz pulses

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