[PDF] Top 20 Resonant Effects in Terahertz Generation with Laser-Induced Gas Plasmas

... Resonant Effects in Terahertz Generation with Laser-Induced Gas Plasmas I. Thiele 1,2 , B. Zhou 3 , A. Nguyen 4 , E. Smetanina 1,5 , R. Nuter 1 , P. ... Voir le document complet

... HAL Id: hal-01924405 https://hal.archives-ouvertes.fr/hal-01924405 Submitted on 15 Nov 2018 HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci- entific research documents, whether ... Voir le document complet

... fields with a sawtooth-like temporal shape do promote the high- est THz signals triggered by tunnel-induced photocur- ...can in principle increase the THz effi- ciency by up to two orders of ... Voir le document complet

... electron gas are excited at the boundary of the metal (Forstman and Gerhardts ...interface. Resonant excitation of SPs can be achieved by an electromagnetic wave at frequencies which match the normal mode ... Voir le document complet

... pulses with orthogonally-polarized colors ...the effects of the pump polarization states were also investigated ...numerically. In [ 40 ] the influence of circularly-polarized two-color pulses driven ... Voir le document complet

... continuing with full Maxwell-consistent simulation re- sults, let us give an intuitive explanation for the difference in the THz spectra in the low-frequency range well below ν p ...electrons ... Voir le document complet

... as terahertz (THz) waves and extending from ...applications in several areas such as medical imaging and remote identification of ...radiation with amplitudes belonging to the GV/m range should allow ... Voir le document complet

... organized in the following ...mechanisms in a con- sistent and straight forward ...occurring in the laser gas inter- action: ionization, heating, collisions, and in particular ... Voir le document complet

... simulations. In the strongest focus- ing case, microplasmas can act as a point source of THz radiation, featuring a toroidal radiation ...mechanism in future ex- ...frequency in the microplasma, ... Voir le document complet

... is in part due to the greater confinement of the plume by the ambient atoms when the pressure is ...particles, in particular the electrons, along the ...present in the plasma [7, 8] resulting ... Voir le document complet

... The paraxial approximation is broken when kw 0 < ∼ 1, τ ω ∼ 1. In this case one should < restore in eq. (19) the second derivatives over z and time: ∂/∂z → ∂/∂z − (ı/4k)∂ 2 /∂z 2 , ∆ ⊥ → ∆ ⊥ − ∂ 2 /c ... Voir le document complet

... ensured generation of a linearly polarized vortex in femtosecond SH beam over all spectral bandwidth of the SH ...along with various commercial THz filters was used to remove the high frequency part ... Voir le document complet

... - 8 - valeur critique, n , correspond à la condition : c ω pe = ω L . Le domaine n e < n c est appelé couronne sous dense par opposition à la zone n e > n c , dite sur-dense. C’est dans cette dernière que se ... Voir le document complet

... [21] In short, a THz beam consisting in a single- cycle THz wave is emitted in air ionized by the fundamental and the second harmonic of 50 fs pulses centered at =800 ...sampling in a 200 µm- ... Voir le document complet

... fast plasmas on a picosecond or subpicosecond time ...techniques in which a short duration probe pulse interro- gates the plasma surface at different time delays after the pump, plasma- producing, ... Voir le document complet

... Introduction Terahertz pulses with large electric field strengths (∼ ...advances in terahertz ...for terahertz generation exist [11, 12], optical rectification of sub-picosecond ... Voir le document complet

... HAL Id: hal-02327613 https://hal.archives-ouvertes.fr/hal-02327613 Submitted on 22 Oct 2019 HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci- entific research documents, whether ... Voir le document complet

... external system to disable the inner control loop and to set all varactor cells to the center of their capacitive range. • A detector (named “detect clamps” in figure 4-1) compares the difference of the output ... Voir le document complet

... method. In a frame co-moving with the nonlinear structure, the fluid equations of continuity and momentum can easily be integrated, with vanishing boundary conditions far away from the ...magnetic ... Voir le document complet

... variations. In all experiments the basic protocol was the same : first, the BBO-focus distance was fixed at the lowest FH wavelength of a given scanned frequency interval and the BBO angles were varied to collect ... Voir le document complet