Title :
Ultrabroadband THz emission with controlled wave-front from LTG GaAs large area interdigitated photoconductive antenna
Author :
M. Baillergeau;T. Nirrengarten;K. Maussang;A. Acquaviva;J. Palomo;S. Dhillon;J. Tignon;J. Mangeney
Author_Institution :
Laboratoire Pierre Aigrain, Ecole Normale Supé
Abstract :
We demonstrate THz pulses emitted by LTG GaAs large area interdigitated photoconductive antennas with frequency components from 0.3 to 20 THz. The THz radiation is characterized with a 20-μm thick ZnTe crystal and the dynamic range reaches 60 dB. Under an original optical excitation scheme, the emitted THz pulses show frequency-independent spherical wave front, which provides focusing of the THz beam close to the diffraction limit.
Keywords :
"Gallium arsenide","Optical pulses","Broadband antennas","Focusing","Optical diffraction","Optical beams"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327615
