DFG-RSF:Controlled femtosecond super-filaments

DFG-RSF：受控飞秒超细丝

• 批准号: 309199899
• 负责人: Professor Dr. Uwe Morgner
• 金额: --
• 依托单位: Faculty of Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/309199899?language=en
• 关键词: DFG; RSF; Controlled; femtosecond; super

So-called super-filaments were discovered very recently and are different from common filaments by higher intensity and higher density of free electrons. They appear due to strong interaction of a multifilament bundle and fission of two and more filaments together. Super-filaments attracted attention in context of so called rogue waves. In particular, one order of magnitude higher plasma density promises higher degree of nonlinearity induced by photo-ionization, and thus, higher efficiency of plasma-induced THz generation. In this project we consider, both experimentally and theoretically, dynamics of super-filaments and in particular THz generation in super-filaments. The experimental part will be carried out in the Moscow group on a novel terawatt laser facility. Theoretical part will be divided between Moscow and Hannover group, profiting from the strong computer cluster facility in located in Hannover. Beyond single color superfilaments, we study two-colour filaments as a possible source of high-energy sub-cycle THz pulses. In theoretical part of our work we will support experiment by comprehensive modeling of the dynamics of field and electron density in superfilaments. Furthermore, we extend the theory in several directions, in particular to clarify the possibility of multi-colour (more than two-colour) super-filaments and the possibility to introduce quasi-phase matching via periodic variation of atomic pressure by a strong acoustic wave.

最近发现了所谓的超丝，与较高的强度和更高的游离电子密度不同。它们的出现是由于多束束的强烈相互作用以及两个和更多细丝的裂变。在所谓的流氓波浪的背景下，超模型引起了人们的关注。特别是，一个数量级较高的血浆密度有望通过光学化引起的较高的非线性程度，因此，血浆诱导的THZ产生的效率更高。在这个项目中，我们在实验和理论上都考虑了超级丝状的动力学，尤其是超丝丝中的THZ产生。实验部分将在莫斯科集团通过新型Terawatt激光设施进行。理论部分将在莫斯科和汉诺威集团之间分配，并从汉诺威的强大计算机集群设施中获利。除了单彩色超纤维外，我们还研究两色细丝作为高能亚周期脉冲的可能来源。在我们工作的理论部分中，我们将通过对超叶片中田间和电子密度的动力学进行全面建模来支持实验。此外，我们将该理论扩展到多个方向，特别是为了阐明多色（超过两种颜色）超丝的可能性，并且有可能通过强烈的声波通过原子压力定期差异引入准相匹配。

项目成果

Regularizing Aperiodic Cycles of Resonant Radiation in Filament Light Bullets.

规范灯丝光弹中共振辐射的非周期循环

• DOI: 10.1103/physrevlett.118.163901
• 发表时间: 2017
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: C. Brée;I. Babushkin;U. Morgner;A. Demircan
• 通讯作者: A. Demircan

Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air

通过空气中的双色飞秒脉冲高效生成太赫兹的最佳线性调频脉冲

• DOI: 10.1063/1.5053893
• 发表时间: 2018-12-10
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Zhang, Zhen;Panov, N.;Savel'ev, A.
• 通讯作者: Savel'ev, A.

Transverse structure and energy deposition by a subTW femtosecond laser in air: from single filament to superfilament

空气中亚TW飞秒激光的横向结构和能量沉积：从单丝到超丝

• DOI: 10.1088/1367-2630/ab043f
• 发表时间: 2019
• 期刊: New Journal of Physics
• 影响因子: 3.3
• 作者: D. Pushkarev;E. Mitina;D. Shipilo;N. Panov;D. Uryupina;A. Ushakov;R. Volkov;A. Karabutov;I. Babushkin;A. Demircan;U. Morgner;O. Kosareva;A. Savel’ev
• 通讯作者: A. Savel’ev

Symmetry Breaking and Strong Persistent Plasma Currents via Resonant Destabilization of Atoms.

• DOI: 10.1103/physrevlett.119.243202
• 发表时间: 2017-12
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: C. Brée;M. Hofmann;A. Demircan;U. Morgner;O. Kosareva;A. Savel’ev;A. Husakou;M. Ivanov;I. Babus

Polarization control of terahertz radiation from two-color femtosecond gas breakdown plasma.

• DOI: 10.1364/ol.43.000090
• 发表时间: 2018
• 期刊: Optics letters
• 影响因子: 3.6
• 作者: O. Kosareva;M. Esaulkov;N. Panov;V. Andreeva;D. Shipilo;P. Solyankin;A. Demircan;I. Babushkin;V. Makarov;U. Morgner;A. Shkurinov;A. Savel’ev