The manipulation of the operating conditions of photoconductive antennas by means of an additional continuous wave (CW) is reported. It is used to control a fiber-based terahertz (THz) time-domain-spectroscopy system at telecom wavelengths. The injection of an optical CW into the transmitter allows the control of the THz amplitude without causing major degradation to the system performance. This, for instance, can be exploited to perform modulation of the THz signal.
© 2013 Optical Society of America
Original Manuscript: May 23, 2013
Revised Manuscript: July 18, 2013
Manuscript Accepted: July 19, 2013
Published: August 13, 2013
A. Bockelt, J. Palací, and B. Vidal, "Control of terahertz emission in photoconductive antennas through an additional optical continuous wave," Opt. Lett. 38, 3123-3125 (2013)