Ultrabroadband THz emission with controlled wave-front from LTG GaAs large area interdigitated photoconductive antenna

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 emit...

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Bibliographic Details
Main Authors: Baillergeau, M., Nirrengarten, T., Maussang, K., Acquaviva, A., Palomo, J., Dhillon, S., Tignon, J., Mangeney, J. N.
Format: Conference Proceeding
Language:English
Subjects:
Antennas
Beams (radiation)
Broadband antennas
Conferences
Emittance
Focusing
Gallium arsenide
Gallium arsenides
Infrared
Optical beams
Optical diffraction
Optical pulses
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Summary: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.
ISSN:2162-2027
2162-2035
DOI:10.1109/IRMMW-THz.2015.7327615