Journal ArticleDOI
THz generation by two-color femtosecond filaments with complex polarization states: four-wave mixing versus photocurrent contributions
V. Yu. Fedorov,V. Yu. Fedorov,V. Yu. Fedorov,Anastasios D. Koulouklidis,Anastasios D. Koulouklidis,Stylianos Tzortzakis,Stylianos Tzortzakis,Stylianos Tzortzakis +7 more
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TLDR
In this paper, the role of the four-wave mixing and plasma mechanisms in the formation of the THz polarization is investigated under specific polarizations of the two-color field components.Abstract:
Two-color filamenation in gases is known to produce intense and broadband THz radiation There are two physical mechanisms responsible for the THz generation in this scheme: four-wave mixing and emission from the induced plasma currents The case when the main and second harmonic are linearly polarized is well studied including the impact from each of the above mechanisms However, for the cases when the two-color fields have complex polarization states the role of the four-wave mixing and plasma mechanisms in the formation of the THz polarization is still under-explored Here we use both the four-wave mixing and photocurrent models in order to consider the THz generation by two-color fields with arbitrary polarizations We show that under specific polarizations of the two-color field components it is possible to determine which of the mechanisms is responsible for the THz polarization formationread more
Citations
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Journal ArticleDOI
Observation of extremely efficient terahertz generation from mid-infrared two-color laser filaments
Anastasios D. Koulouklidis,Claudia Gollner,Valentina Shumakova,Vladimir Yu. Fedorov,Vladimir Yu. Fedorov,Audrius Pugžlys,Andrius Baltuška,Stelios Tzortzakis,Stelios Tzortzakis,Stelios Tzortzakis +9 more
TL;DR: Efficient sub-cycle THz pulse generation by using two-color midinfrared femtosecond laser filaments in ambient air using affordable table-top laser systems is experimentally demonstrated.
Journal ArticleDOI
Highly efficient broadband terahertz generation from ultrashort laser filamentation in liquids.
Indranuj Dey,Kamalesh Jana,Vladimir Yu. Fedorov,Vladimir Yu. Fedorov,Anastasios D. Koulouklidis,Angana Mondal,Moniruzzaman Shaikh,Deep Sarkar,Amit D. Lad,Stylianos Tzortzakis,Stylianos Tzortzakis,Stylianos Tzortzakis,Arnaud Couairon,G. Ravindra Kumar +13 more
TL;DR: This work demonstrates the generation of terahertz radiation via ultrashort pulse induced filamentation in liquids with an order of magnitude higher energy than from conventional two-color filamentations in air.
Journal ArticleDOI
Terahertz pulse generation by two-color laser fields with circular polarization
C. Tailliez,A. Stathopulos,Stefan Skupin,Danas Buožius,Ihar Babushkin,V. Vaičaitis,Luc Bergé +6 more
TL;DR: In this paper, the influence of the polarization states of femtosecond two-color pulses ionizing gases on the emitted terahertz radiation was investigated and it was shown that the increase in the energy yield was associated with longer ionization sequences and higher electron transverse momenta acquired in the driving field.
Journal ArticleDOI
Terahertz pulse generation by two-color laser fields with circular polarization
C. Tailliez,A. Stathopulos,Stefan Skupin,Danas Buožius,Ihar Babushkin,V. Vaičaitis,Luc Bergé +6 more
TL;DR: In this article, the influence of the polarization states of femtosecond two-color pulses ionizing gases on the emitted terahertz radiation was investigated and it was shown that the increase in the energy yield was associated with longer ionization sequences and higher electron transverse momenta acquired in the driving field.
Journal ArticleDOI
Sensing with Femtosecond Laser Filamentation
Pengfei Qi,Wenqi Qian,Lanjun Guo,Jiayun Xue,Nan Zhang,Yuezheng Wang,Zhi Zhang,Zeliang Zhang,Lie Lin,Chang-Lin Sun,Liguo Zhu,Weiwei Liu +11 more
TL;DR: In this article , the authors mainly focus on recent advances in sensing with femtosecond laser filamentation, including fundamental physics, sensing and manipulating methods, typical filament-based sensing techniques and application scenarios, opportunities, and challenges toward the filamentbased remote sensing under different complicated conditions.
References
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Journal ArticleDOI
Terahertz semiconductor-heterostructure laser
R. Kohler,Alessandro Tredicucci,Fabio Beltram,Harvey E. Beere,Edmund H. Linfield,Giles Davies,David A. Ritchie,Rita Claudia Iotti,Fausto Rossi +8 more
TL;DR: A monolithic terahertz injection laser that is based on interminiband transitions in the conduction band of a semiconductor (GaAs/AlGaAs) heterostructure is reported, which is very promising for extending the present laser concept to continuous-wave and high-temperature operation, which would lead to implementation in practical photonic systems.
Terahertz semiconductor heterostructure laser
R. Kohler,Alessandro Tredicucci,Fabio Beltram,Harvey E. Beere,Edmund H. Linfield,Giles Davies,David A. Ritchie,Rita Claudia Iotti,Fausto Rossi +8 more
TL;DR: In this article, a monolithic terahertz injection laser that is based on interminiband transitions in the conduction band of a semiconductor (GaAs/AlGaAs) heterostructure is presented.
Tunnel ionization of complex atoms and of atomic ions in an altemating electromagnetic field
TL;DR: In this article, an expression for the probability of tunnel ionization in an alternating field, of a complex atom and of an atomic ion that are in an arbitrary state, was derived in the quasiclassical approximation n* $1.
Journal ArticleDOI
Intense terahertz pulses by four-wave rectification in air
D. J. Cook,Robin M. Hochstrasser +1 more
TL;DR: A new four-wave rectification method for the generation of intense, ultrafast terahertz pulses from gases that is sensitive to the relative phases of the fundamental and second-harmonic pulses.
Journal ArticleDOI
High-power terahertz radiation from relativistic electrons
TL;DR: Calculations and measurements are reported that confirm the production of high-power broadband THz radiation from subpicosecond electron bunches in an accelerator, several orders of magnitude higher than any existing source, which could enable various new applications.