Generation of Terahertz Radiation by Relativistic Laser Pulses on the Surface of Thick Solid Targets and Thin Foils

Author:

Mitrofanov A. V.,Rozhko M. V.,Nazarov M. M.,Yakushkin N. V.,Voronin A. A.,Fedotov A. B.,Sidorov-Biryukov D. A.

Abstract

Terahertz pulse generation from multiterawatt laser surface plasma near thick solid targets and thin foils has been studied. Pulses with energies up to 7 μJ were detected in the spectral region <3THz in the direction of specular reflection from the surface of the CaF2 target. The dependence of the terahertz pulse energy WT Hz on the laser pulse intensity $$I_{L}^{\alpha }$$ can be approximated by the power function WT Hz ~ $$I_{L}^{\alpha }$$. For a fixed laser pulse duration and variable energy the power index lies in the range α ≈ 1.5…2.8, while for a fixed energy and variable duration α ≈ 1.

Publisher

Pleiades Publishing Ltd

Subject

Physics and Astronomy (miscellaneous)

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