Abstract

We demonstrate a simulation of lateral photo-Dember terahertz (THz) emitters in two dimensions using the drift diffusion equation coupled to a finite-difference time-domain model with a far-field algorithm that can take into account the angular spectrum of emission and propagation. We show that the dynamics of the system are more dependent on the currents traveling perpendicular to the semiconductor surface, as opposed to just the lateral currents as previously thought. The 2D simulation is needed in order to correctly represent experiments that measure emission out of lateral photo-Dember emitters.

© 2018 Optical Society of America

Fluence and polarisation dependence of GaAs based Lateral Photo-Dember terahertz emitters

D. McBryde, M. E. Barnes, S. A. Berry, P. Gow, H. E. Beere, D. A. Ritchie, and V. Apostolopoulos
Opt. Express 22(3) 3234-3243 (2014)

Investigation of the role of the lateral photo-Dember effect in the generation of terahertz radiation using a metallic mask on a semiconductor

M. E. Barnes, S. A. Berry, P. Gow, D. McBryde, G. J. Daniell, H. E. Beere, D. A. Ritchie, and V. Apostolopoulos
Opt. Express 21(14) 16263-16272 (2013)

Terahertz emission from lateral photo-Dember currents

G. Klatt, F. Hilser, W. Qiao, M. Beck, R. Gebs, A. Bartels, K. Huska, U. Lemmer, G. Bastian, M.B. Johnston, M. Fischer, J. Faist, and T. Dekorsy
Opt. Express 18(5) 4939-4947 (2010)

Terahertz emission by diffusion of carriers and metal-mask dipole inhibition of radiation

M. E. Barnes, D. McBryde, G. J. Daniell, G. Whitworth, A. L. Chung, A. H. Quarterman, K. G. Wilcox, A. Brewer, H. E. Beere, D. A. Ritchie, and V. Apostolopoulos
Opt. Express 20(8) 8898-8906 (2012)

Dember and photo-electromotive-force currents in silicon photoconductive detectors

Yamaç Dikmelik and Frederic M. Davidson
J. Opt. Soc. Am. B 21(9) 1595-1605 (2004)