Cliffe, M.J. and Rodak, A. and Graham, D.M. and Jamison, S.P. (2014) Generation of longitudinally polarized terahertz pulses with field amplitudes exceeding 2 kV/cm. Applied Physics Letters, 105 (19). ISSN 0003-6951
Full text not available from this repository.Abstract
We demonstrate the generation of near-single cycle longitudinally polarized terahertz radiation using a large-area radially biased photoconductive antenna with a longitudinal field amplitude in excess of 2 kV/cm. The 76 mm diameter antenna was photo-excited by a 0.5 mJ amplified nearinfrared femtosecond laser system and biased with a voltage of up to 100 kV applied over concentric electrodes. Amplitudes for both the transverse and longitudinal field components of the source were measured using a calibrated electro-optic detection scheme. By tightly focusing the radiation emitted from the photoconductive antenna, we obtained a maximum longitudinal field amplitude of 2.22 kV/cm with an applied bias field of 38.5 kV/cm.