Single-cycle terahertz pulses with >0.2 V/Å field amplitudes via coherent transition radiation

Authors

Dan Daranciang, Stanford University
John Goodfellow, Stanford University
Matthias Fuchs, University of Nebraska - LincolnFollow
Haidan Wen, Argonne National LaboratoryFollow
Shambhu Ghimire, SLAC National Accelerator LaboratoryFollow
David A. Reis, Stanford University
Henrik Loos, SLAC National Accelerator Laboratory
Alan Fisher, SLAC National Accelerator Laboratory
Aaron Lindenberg, Stanford UniversityFollow

Date of this Version

2011

Document Type

Article

Citation

Applied Physics Letters 99, 141117 (2011); doi: 10.1063/1.3646399.

Comments

Copyright 2011 American Institute of Physics. Used by permission.

Abstract

We demonstrate terahertz pulses with field amplitudes exceeding 0.2 V/Å generated by coherent transition radiation. Femtosecond, relativistic electron bunches generated at the Linac Coherent Light Source are passed through a beryllium foil, and the emitted radiation is characterized as a function of the bunch duration and charge. Broadband pulses centered at a frequency of 10 THz with energies of 140 µJ are measured. These far-below- band gap pulses drive a nonlinear optical response in a silicon photodiode, with which we perform nonlinear autocorrelations that yield information regarding the terahertz temporal profile.