Abstract-20 THz broadband generation using semi-insulating GaAs interdigitated photoconductive antennas

P. J. Hale, J. Madeo, C. Chin, S. S. Dhillon, J. Mangeney, J. Tignon, and K. M. Dani  »View Author Affiliations

http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-22-21-26358

Optics Express, Vol. 22, Issue 21, pp. 26358-26364 (2014)
http://dx.doi.org/10.1364/OE.22.026358

We demonstrate broadband (20 THz), high electric field, terahertz generation using large area interdigitated antennas fabricated on semi-insulating GaAs. The bandwidth is characterized as a function of incident pulse duration (15-35 fs) and pump energy (2-30 nJ). Broadband spectroscopy of PTFE is shown. Numerical Drude-Lorentz simulations of the generated THz pulses are performed as a function of the excitation pulse duration, showing good agreement with the experimental data.

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