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Fourier-Limited Attosecond Pulse from High Harmonic Generation Assisted by Ultrafast Magnetic Fields
- 超快科学（英文） 2023年3卷第5期
- Affiliations：
a Grupo de Investigación en Aplicaciones del Láser y Fotónica, Departamento de Física Aplicada, Universidad de Salamanca, E-37008 Salamanca, Spain. b Photonics Institute, Technische Universität Wien,- Vienna,A,Austria,1040
- Author bio：
- Funds：
DOI：10.34133/ultrafastscience.0036
中图分类号：纸质出版日期：2023，
- Accepted：
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Rodrigo Martín-Hernández, Hongtao Hu, Andrius Baltuska, Luis Plaja, Carlos Hernández-García. 2023: Fourier-Limited Attosecond Pulse from High Harmonic Generation Assisted by Ultrafast Magnetic Fields. 超快科学, 3(5).
Rodrigo Martín-Hernández, Hongtao Hu, Andrius Baltuska, Luis Plaja, Carlos Hernández-García. 2023: Fourier-Limited Attosecond Pulse from High Harmonic Generation Assisted by Ultrafast Magnetic Fields. Ultrafast Science, 3(5).
Rodrigo Martín-Hernández, Hongtao Hu, Andrius Baltuska, Luis Plaja, Carlos Hernández-García. 2023: Fourier-Limited Attosecond Pulse from High Harmonic Generation Assisted by Ultrafast Magnetic Fields. 超快科学, 3(5). DOI： 10.34133/ultrafastscience.0036
Rodrigo Martín-Hernández, Hongtao Hu, Andrius Baltuska, Luis Plaja, Carlos Hernández-García. 2023: Fourier-Limited Attosecond Pulse from High Harmonic Generation Assisted by Ultrafast Magnetic Fields. Ultrafast Science, 3(5). DOI： 10.34133/ultrafastscience.0036
摘要
One of the main constraints for reducing the temporal duration of attosecond pulses is the attochirp inherent to the process of high-order harmonic generation (HHG). Though the attochirp can be compensated in the extreme-ultraviolet using dispersive materials
this is unfeasible toward x-rays
where the shortest attosecond or even sub-attosecond pulses could be obtained. We theoretically demonstrate that HHG driven by a circularly polarized infrared pulse while assisted by an strong oscillating ultrafast intense magnetic field enables the generation of few-cycle Fourier-limited few attosecond pulses. In such a novel scenario
the magnetic field transversally confines the ionized electron during the HHG process
analogously to a nanowire trapping. Once the electron is ionized
the transverse electron dynamics is excited by the magnetic field
acting as a high-energy reservoir to be released in the form of phase-locked spectrally wide high-frequency harmonic radiation during the electron recollision with the parent ion. In addition
the transverse breathing dynamics of the electron wavepacket
introduced by the magnetic trapping
strongly modulates the recollision efficiency of the electronic trajectories
thus the attosecond pulse emissions. The aftermath is the possibility of producing high-frequency (hundreds of eV) attosecond isolated few-cycle pulses
almost Fourier limited. The isolated intense magnetic fields considered in our simulations
of tens of kT
can be produced in finite spatial volumes considering structured beams or stationary configurations of counter-propagating state-of-the-art multi-terawatt/petawatt lasers.
Abstract
One of the main constraints for reducing the temporal duration of attosecond pulses is the attochirp inherent to the process of high-order harmonic generation (HHG). Though the attochirp can be compensated in the extreme-ultraviolet using dispersive materials
this is unfeasible toward x-rays
where the shortest attosecond or even sub-attosecond pulses could be obtained. We theoretically demonstrate that HHG driven by a circularly polarized infrared pulse while assisted by an strong oscillating ultrafast intense magnetic field enables the generation of few-cycle Fourier-limited few attosecond pulses. In such a novel scenario
the magnetic field transversally confines the ionized electron during the HHG process
analogously to a nanowire trapping. Once the electron is ionized
the transverse electron dynamics is excited by the magnetic field
acting as a high-energy reservoir to be released in the form of phase-locked spectrally wide high-frequency harmonic radiation during the electron recollision with the parent ion. In addition
the transverse breathing dynamics of the electron wavepacket
introduced by the magnetic trapping
strongly modulates the recollision efficiency of the electronic trajectories
thus the attosecond pulse emissions. The aftermath is the possibility of producing high-frequency (hundreds of eV) attosecond isolated few-cycle pulses
almost Fourier limited. The isolated intense magnetic fields considered in our simulations
of tens of kT
can be produced in finite spatial volumes considering structured beams or stationary configurations of counter-propagating state-of-the-art multi-terawatt/petawatt lasers.
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references
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Chi, C., Guo, Y., Wang, B. Understanding Effects of Static Electric-field on High-order Harmonic Generation of O2 Molecules（Invited） | [外加静电场对 O2分子高次谐波的调制机制（特邀）]. Guangzi Xuebao/Acta Photonica Sinica, 2024, 53(6): 0653205. DOI:10.3788/gzxb20245306.0653205.
Chen, Z., Li, B., Zhang, C. et al. Analysis of Phase-matching Conditions for Isolated Attosecond Pulses Generated by Three-color Lasers in a Gas-filled Waveguide（Invited） | [三 色 激 光 在 充 气 波 导 管 内 产 生 孤 立 阿 秒 脉 冲相 位 匹 配 条 件 的 分 析（特 邀）]. Guangzi Xuebao/Acta Photonica Sinica, 2024, 53(6): 0653207. DOI:10.3788/gzxb20245306.0653207.
Chen, Z., Li, B., Zhang, C. et al. Analysis of Phase-matching Conditions for Isolated Attosecond Pulses Generated by Three-color Lasers in a Gas-filled Waveguide（Invited） | [三 色 激 光 在 充 气 波 导 管 内 产 生 孤 立 阿 秒 脉 冲相 位 匹 配 条 件 的 分 析（特 邀）]. Guangzi Xuebao/Acta Photonica Sinica, 2024, 53(6): 0653207. DOI:10.3788/gzxb20245306.0653207.
Martín-Domene, S., Sánchez-Tejerina, L., Martín-Hernández, R. et al. Generation of intense, polarization-controlled magnetic fields with non-paraxial structured laser beams. Applied Physics Letters, 2024, 124(21): 211101. DOI:10.1063/5.0197085.
Martín-Domene, S., Sánchez-Tejerina, L., Martín-Hernández, R. et al. Generation of intense, polarization-controlled magnetic fields with non-paraxial structured laser beams. Applied Physics Letters, 2024, 124(21): 211101. DOI:10.1063/5.0197085.
Martín-Hernández, R., Grünewald, L., Sánchez-Tejerina, L. et al. Optical magnetic field enhancement using ultrafast azimuthally polarized laser beams and tailored metallic nanoantennas. Photonics Research, 2024, 12(5): 1078-1092. DOI:10.1364/PRJ.511916.
Martín-Hernández, R., Grünewald, L., Sánchez-Tejerina, L. et al. Optical magnetic field enhancement using ultrafast azimuthally polarized laser beams and tailored metallic nanoantennas. Photonics Research, 2024, 12(5): 1078-1092. DOI:10.1364/PRJ.511916.
de las Heras, A., Bonafé, F.P., Hernández-García, C. et al. Tunable Tesla-Scale Magnetic Attosecond Pulses through Ring-Current Gating. Journal of Physical Chemistry Letters, 2023, 14(49): 11160-11167. DOI:10.1021/acs.jpclett.3c02899.
de las Heras, A., Bonafé, F.P., Hernández-García, C. et al. Tunable Tesla-Scale Magnetic Attosecond Pulses through Ring-Current Gating. Journal of Physical Chemistry Letters, 2023, 14(49): 11160-11167. DOI:10.1021/acs.jpclett.3c02899.
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