Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Vladimir Yu. Fedorov"'
Autor:
Anastasios D. Koulouklidis, Claudia Gollner, Valentina Shumakova, Vladimir Yu. Fedorov, Audrius Pugžlys, Andrius Baltuška, Stelios Tzortzakis
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
Powerful terahertz pulses are generated during the nonlinear propagation of ultrashort laser pulses in gases. Here, the authors demonstrate efficient sub-cycle THz pulse generation by using two-color midinfrared femtosecond laser filaments in ambient
Externí odkaz:
https://doaj.org/article/cbf35a10595242af8088b5390c11e83f
Autor:
Margaux Chanal, Vladimir Yu. Fedorov, Maxime Chambonneau, Raphaël Clady, Stelios Tzortzakis, David Grojo
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017)
Ultrafast laser processing is a versatile three-dimensional photonic structuring method but it has been limited to wide band gap materials like glasses. Here, Chanal et al. demonstrate direct refractive-index modification in the bulk of silicon by ex
Externí odkaz:
https://doaj.org/article/7ccda1285b2345f9a690836765d1eda0
Autor:
Indranuj Dey, Kamalesh Jana, Vladimir Yu. Fedorov, Anastasios D. Koulouklidis, Angana Mondal, Moniruzzaman Shaikh, Deep Sarkar, Amit D. Lad, Stelios Tzortzakis, Arnaud Couairon, G. Ravindra Kumar
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Developing simple and efficient table-top sources of intense terahertz radiation is an ongoing pursuit. Here, Dey et al. demonstrate broadband terahertz generation from laser filamentation in liquids with an order of magnitude higher energy than from
Externí odkaz:
https://doaj.org/article/283b72f52315457ebbdc32020afe47a6
Autor:
Anastasios D. Koulouklidis, Dimitris Mansour, Vladimir Yu. Fedorov, Dimitris G. Papazoglou, Stelios Tzortzakis
Publikováno v:
Optics letters. 47(5)
We experimentally demonstrate that 2D Airy wave packets can produce intense curved two-color filaments that emit terahertz (THz) radiation with unique characteristics. Due to the curvature of the plasma channel, THz waves, emitted from different long
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate that thermal effects limiting femtosecond laser filamentation in gases can be addressed using a simple gas replenishment method. This enables high average power filamentation applications like THz sources.
Autor:
Claudia Gollner, Valentina Shumakova, Audrius Pugžlys, Anastasios D. Koulouklidis, Stelios Tzortzakis, Vladimir Yu. Fedorov, Andrius Baltuška
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
Nature Communications
Nature Communications
Extreme nonlinear interactions of THz electromagnetic fields with matter are the next frontier in nonlinear optics. However, reaching this frontier in free space is limited by the existing lack of appropriate powerful THz sources. Here, we experiment
Autor:
Qingfeng Li, Vladimir Yu. Fedorov, Stefan Nolte, Markus Blothe, Maxime Chambonneau, Stelios Tzortzakis
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Ultrafast laser welding is a proven technique which enables to bond a wide variety of materials together. This technique relies on laser energy deposition at the interface between two materials. While, to date, ultrafast laser welding has been demons
Autor:
Vladimir Yu. Fedorov, Christina Daskalaki, Anastasios D. Koulouklidis, Christina Lanara, Stelios Tzortzakis
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Nowadays, one of the most advantageous techniques for table-top terahertz (THz) generation is the two-color laser filamentation in gases, where an ultrashort laser pulse together with its second harmonic are focused into a gas medium, forming an ioni
Autor:
Qingfeng Li, Stelios Tzortzakis, Vladimir Yu. Fedorov, Stefan Nolte, Maxime Chambonneau, Markus Blothe
Publikováno v:
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI.
Ultrafast laser welding is a fast, clean, and contactless technique for joining a broad range of materials. Nevertheless, this technique cannot be applied for bonding semiconductors and metals. By investigating the nonlinear propagation of picosecond
Autor:
Stelios Tzortzakis, Christina Lanara, Anastasios D. Koulouklidis, Vladimir Yu. Fedorov, Christina Daskalaki
Publikováno v:
Conference on Lasers and Electro-Optics.
We report on the impact of laser pulse repetition rate on two-color filamentation based terahertz sources. A 50% decrease on the terahertz energy is observed when the repetition rate increases from 0.6 to 6 kHz.