Towards High-Repetition-Rate Intense Terahertz Source With Metal Wire-Based Plasma

Abstract

Terahertz radiation can provide unprecedented vistas in physical studies such as transient matter state control and advanced free-electron manipulation. Here, we present one feasible path towards high-repetition-rate, intense THz sources by combining the wire-based THz source on a consecutively running, wire-conveying tape design. The proof-of-principle experimental results show an upper 30 mW average THz power output under 1 kHz laser excitation, which presents the first high-repetition-rate, and most importantly, portable and application in handy THz source that is generated by solid plasmas. The generated THz pulses are characterized with a 0.3 THz center frequency and ~0.3 THz bandwidth. We believe this tabletop laser-driven highrepetition-rate THz source will open a new door for THz and related interdisciplinary sciences.

On the Possibility of Intense Unipolar THz Pulses Formation in Nonhomogeneous Nonequilibrium Nitrogen Plasma Channels

“…For the above parameters the pulse given by ( 9) is nearly a single cycle pulse. Such pulse shapes are rather typical for modern experiments [23,33,34]. Also, it is important that the plasma channel radius is much greater than the seed THz pulse wavelength λ = 2πc/ω 0 .…”

“…At present, a number of methods to produce subcycle unipolar pulse in different frequency ranges from THz to UV have been proposed [1][2][3][4][18][19][20][21][22][23][24]. In particular, in [22], the possibility to transform the single-cycle THz pulse to the unipolar one during the process of its propagation in the extended nonequilibrium xenon plasma channel with a peak-like electron velocity distribution function (EVDF) was demonstrated.…”

Propagation of electromagnetic pulses with nonzero area in dissipative media

“…The electric area of the pulse as an integral of the electric field strength over pulse duration is S T (r) = ˆE (r, t) dt (1) and was first introduced in [1]. Recent progress in ultrashort pulse generation with a broad frequency band [2][3][4][5][6][7] has made the problem of generation and propagation of electromagnetic pulses with nonzero area (or quasiunipolar pulses) in different media again actual. The nonzero value of the electric pulse area means that the pulse contains a static component of the electric field.…”

Timing fluctuation correction for the front end of a 100-PW laser

“…High-intensity ultrafast laser facilities provide laser pulses with ultra-high peak power within a few femtoseconds to picoseconds, which create unique and extreme laboratory conditions that can accelerate and collide intense beams of elementary particles [1][2][3] , actuate nuclear reactions [4][5][6] , heat matter at conditions found in stars [7,8] or even create matter out of the empty vacuum [9][10][11] . The progress of highintensity ultrafast lasers promotes the development of a wide variety of fields, including high-field laser physics [12,13] , laser ignition devices [14,15] , the generation of hard X-rays [16,17] , atomic physics [18,19] , particle acceleration [1,20] , attosecond science [21,22] and the generation of intense terahertz sources [23][24][25] . Thanks to the development of chirped pulse amplification (CPA) and optical parametric chirped pulse amplification (OPCPA) in recent decades, super-intense ultrashort lasers have been significantly promoted in many laboratories and have aroused the extensive interest of researchers [26,27] .…”