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Simulation of THz generation and propagation from photo-Dember emitters

Simulation of THz generation and propagation from photo-Dember emitters
Simulation of THz generation and propagation from photo-Dember emitters

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.

0740-3224
1552-1556
Maple, Lewis
640a31c4-0cf3-46f1-a256-54c59ddb7ff0
Gow, P.C.
193394b1-fe2d-41de-a9aa-6de7e5925b18
Apostolopoulos, Vasilis
8a898740-4c71-4040-a577-9b9d70530b4d
Maple, Lewis
640a31c4-0cf3-46f1-a256-54c59ddb7ff0
Gow, P.C.
193394b1-fe2d-41de-a9aa-6de7e5925b18
Apostolopoulos, Vasilis
8a898740-4c71-4040-a577-9b9d70530b4d

Maple, Lewis, Gow, P.C. and Apostolopoulos, Vasilis (2018) Simulation of THz generation and propagation from photo-Dember emitters. Journal of the Optical Society of America B: Optical Physics, 35 (7), 1552-1556. (doi:10.1364/JOSAB.35.001552).

Record type: Article

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.

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More information

Accepted/In Press date: 11 May 2018
e-pub ahead of print date: 15 May 2018
Published date: 11 June 2018
Learn more about Optoelectronics Research Centre research Learn more about Physics & Astronomy research

Identifiers

Local EPrints ID: 423544
URI: http://eprints.soton.ac.uk/id/eprint/423544
DOI: doi:10.1364/JOSAB.35.001552
ISSN: 0740-3224
PURE UUID: 99a9faee-5af6-46b4-b900-f30c4170f0be
ORCID for P.C. Gow: ORCID iD orcid.org/0000-0002-3247-9082
ORCID for Vasilis Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191

Catalogue record

Date deposited: 25 Sep 2018 16:30
Last modified: 16 Mar 2024 04:10

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Contributors

Author: Lewis Maple
Author: P.C. Gow ORCID iD
Author: Vasilis Apostolopoulos ORCID iD

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