TY  - JOUR
A1  - Klier, Jens
A1  - Torosyan, Garik
A1  - Schreiner, Nina Susan
A1  - Molter, Daniel
A1  - Ellrich, Frank
A1  - Zouaghi, Wissem
A1  - Peytavit, Emilien
A1  - Lampin, Jean-François
A1  - Beigang, René
A1  - Jonuscheit, Joachim
A1  - Freymann, Georg von
T1  - Influence of substrate material on radiation characteristics of thz photoconductive emitters
T2  - International journal of antennas and propagation
N2  - We present in this paper spectral and spatial characteristics of terahertz emission from standard dipole antenna structures used as emitters depending on the substrate material. All antenna structures were lithographically fabricated on low-temperature (LT) grown, few-micrometers-thick gallium arsenide (GaAs) layers. To investigate the effect of the substrate material on the radiation pattern of terahertz beams, either semi-insulating gallium arsenide or high-resistivity silicon substrate wafers have been used. As detector a standard 40 µm long dipole antenna on a semi-insulating GaAs substrate with a low-temperature grown gallium arsenide layer on it has been employed; this configuration allows for broadband detection and is still efficient enough for the characterization purpose. Strong dependence of the radiation pattern on the substrate used for the terahertz source is demonstrated. The measured patterns and differences between the two cases of substrates are well explained by means of classical diffraction.
Y1  - 2015
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/50663
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-506637
SN  - 1687-5877
SN  - 1687-5869
N1  - Copyright © 2015 Jens Klier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
VL  - 9
IS  - Art. 540175
SP  - 1
EP  - 7
PB  - Hindawi
CY  - New York, NY
ER  -