%0 Conference Paper
%A Gopal, Amrutha
%A May, Torsten
%A Singh, Pushkar
%A Herzer, Sven
%A Ziegler, Wolfgang
%A Paulus, Gerhard G.
%A Schmidt, Albrecht
%A Reinhard, Andreas
%A Dillner, Ulrich
%A Meyer, Hans-Georg
%A Karmakar, Anupam
%A Brömmel, Dirk
%A Gibbon, Paul
%T 700μJ THz pulses from a laser-driven particle accelerator
%C Washington, DC
%I Society of Photo-Optical Instrumentation Engineers (SPIE)
%M FZJ-2014-01797
%P 123-150
%D 2013
%< SPIE Proceedings, Volume 8779, Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III
%X Here we report a laser plasma-driven source of T-rays with the highest pulse energy ever recorded in a laboratory. T-rays are emitted from therear surface of a solid target in the non-collinear direction at incident laser intensities ~ 10^19 W/cm^2. Pulse energy measurements reported T-ray pulses with peak energies no less than 700 μJ. Temporal measurements using a single-shot electro-optic method showed the presence of sub-picosecond T-ray pulseswith 570 fs duration, thus rendering the peak-power of the source higher even than that of state-of-the-art synchrotrons. A conversion efficiencyof higher than 10^-3 and an average power of 7 mW makes it the most efficient compact and powerful THz source known today. Spectral analysis revealed the presences of frequencies ranging from 0.1 - 133 THz, while most of the energy is localised in the low frequency region. The dependence of T-ray yield on incident laser energy is linear and shows no signs of saturation. The spatial distribution of the recorded T-rays indicates that most of the T-rays are emitted in the non-collinear direction from the rear-surface of a solid target and the contribution in the forward direction is very small. 2D particle-in-cellsimulations show the presence of transient current at the target rear surface.
%B SPIE Optics + Optoelectronics
%C 15 Apr 2013 - 18 Apr 2013, Prague (Czech Republic)
Y2 15 Apr 2013 - 18 Apr 2013
M2 Prague, Czech Republic
%F PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
%9 Contribution to a conference proceedingsContribution to a book
%U <Go to ISI:>//WOS:000323544600039
%R 10.1117/12.2017254
%U https://juser.fz-juelich.de/record/151970