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您的检索式：作者名="Andrius Baltuska"
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| 1 | Solitary beam propagation in periodic layered Kerr media enables high-efficiency pulse compression and mode self-cleaning显示文摘Generating intense ultrashort pulses with high-quality spatial modes is crucial for ultrafast and strong-field science and can be achieved by nonlinear supercontinuum generation(SCG)and pulse compression.In this work,we propose that the generation of quasi-stationary solitons in periodic layered Kerr media can greatly enhance the nonlinear lightmatter interaction and fundamentally improve the performance of SCG and pulse compression in condensed media.With both experimental and theoretical studies,we successfully identify these solitary modes and reveal their unified condition for stability.Space-time coupling is shown to strongly influence the stability of solitons,leading to variations in the spectral,spatial and temporal profiles of femtosecond pulses.Taking advantage of the unique characteristics of these solitary modes,we first demonstrate single-stage SCG and the compression of femtosecond pulses from 170 to 22 fs with an efficiency>85%.The high spatiotemporal quality of the compressed pulses is further confirmed by highharmonic generation.We also provide evidence of efficient mode self-cleaning,which suggests rich spatiotemporal self-organization of the laser beams in a nonlinear resonator This work offers a route towards highly efficient,simple,stable and highly flexible SCG and pulse compression solutions for state-of-the-art ytterbium laser technology. | Sheng Zhang Zongyuan Fu Bingbing Zhu Guangyu Fan Yudong Chen Shunjia Wang Yaxin Liu Andrius Baltuska Cheng Jin Chuanshan Tian Zhensheng Tao | 2021 | Light(Science & Applications)2021，10，4： | 3 |
| 2 | Channel-resolved subcycle interferences of electron wave packets emitted from H_(2) in two-color laser fields显示文摘We report on the observation of subcycle interferences of electron wave packets released during strong field ionization of H_2 with cycle-shaped two-color laser fields. With a reaction microscope we measure three-dimensional momentum distributions of photoelectrons correlated with either H_2^+ or protons within different energy ranges generated by dissociation of H_2^+. We refer to these different types of photoelectrons as channels. Our results show that the subcycle interference structures of electron wave packets are very sensitive to the cycle shape of the two-color laser field. We explain this behavior by the dependence of the ionization time within an optical cycle on the shape of the laser field cycle. The subcycle interference structures can be further used to obtain insight into the subcycle dynamics of molecules during strong field interaction. | Xinhua Xie Stefan Roither Daniil Kartashov Li Zhang Andrius Baltuska Markus Kitzler | 2016 | High Power Laser Science and Engineering2016，4，4： | 0 |
| 3 | Fourier-Limited Attosecond Pulse from High Harmonic GenerationAssistedbyUlitrafast MagneticFields显示文摘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. | Rodrigo Martin-Hernandez Hongtao Hu Andrius Baltuska Luis Plaja Carlos Hernandez-Garcia'I | 2023 | Ultrafast Science2023，3，5： | 0 |
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