We demonstrate multiplexed terahertz emitters that exhibits 2 THz bandwidth that do not require an external bias. The emitters operate under uniform illumination eliminating the need for a micro-lens array and are fabricated with periodic Au and Pb structures on GaAs. Terahertz emission originates from the lateral photo-Dember effect and from the different Schottky barrier heights of the chosen metal pair. We characterize the emitters and determine that most terahertz emission at 300 K is due to band-bending due to the Schottky barrier of the metal.
@article{arxiv.1404.5792,
title = {Multiple double-metal bias-free terahertz emitters},
author = {Duncan McBryde and Paul Gow and Sam A. Berry and Armen Aghajani and Mark E. Barnes and V. Apostolopoulos},
journal= {arXiv preprint arXiv:1404.5792},
year = {2015}
}