We present a fast and low-cost delay generator for terahertz (THz) waves that transfers a rotational motion of a transparent dielectric cube into an effective THz delay. The device is easily implemented in the THz beam path and allows for coherent sampling over 40 ps with a scan rate of hundreds of hertz. Furthermore, we show that our approach is particularly suitable for fast THz imaging.
© 2014 Optical Society of America
Original Manuscript: May 22, 2014
Revised Manuscript: July 14, 2014
Manuscript Accepted: July 15, 2014
Published: August 13, 2014
Vol. 9, Iss. 10 Virtual Journal for Biomedical Optics
T. Probst, A. Rehn, S. F. Busch, S. Chatterjee, M. Koch, and M. Scheller, "Cost-efficient delay generator for fast terahertz imaging," Opt. Lett. 39, 4863-4866 (2014)