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.

所谓的超细丝是最近才发现的，与普通细丝不同的是，它具有更高的自由电子强度和密度。它们的出现是由于复丝束的强烈相互作用和两个或多个细丝分裂在一起。超细丝在所谓的流氓波的背景下引起了人们的注意。特别是，一个数量级更高的等离子体密度承诺由光电离引起的更高程度的非线性，因此，更高的等离子体诱导太赫兹产生效率。在这个项目中，我们认为，在实验和理论上，动力学的超细丝，特别是太赫兹产生的超细丝。实验部分将在莫斯科小组的一个新型太瓦激光设施上进行。理论部分将在莫斯科和汉诺威集团之间划分，受益于位于汉诺威的强大计算机集群设施。除了单色超细丝，我们研究了双色细丝作为高能量子周期太赫兹脉冲的可能来源。在理论部分，我们的工作将支持实验的全面建模的场和电子密度的动力学超细丝。此外，我们在几个方向上扩展的理论，特别是澄清多色（超过两种颜色）超细丝的可能性和可能性，引入准相位匹配通过原子压力的周期性变化的强声波。

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

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

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.

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