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Optical Properties of Highly Conductive SrMoO3 Oxide Thin Films in the THz Band and Beyond

Regensburger, Stefan and Mohammadi, Mahdad and Khawaja, Arslan A. and Radetinac, Aldin and Komissinskiy, Philipp and Alff, Lambert and Preu, Sascha (2020):
Optical Properties of Highly Conductive SrMoO3 Oxide Thin Films in the THz Band and Beyond.
In: Journal of Infrared, Millimeter, and Terahertz Waves, 41 (10), pp. 1170-1180. Springer, ISSN 1866-6892,
DOI: 10.1007/s10762-020-00697-z,
[Article]

Abstract

Strontium molybdate (SrMoO3) thin films are grown epitaxially by pulsed laser deposition onto gadolinium scandate (GdScO3) substrates and characterized in the terahertz (THz) and visible part of the electromagnetic spectrum. X-ray diffraction measurements prove a high crystallinity and phase-pure growth of the thin films. The high-quality SrMoO3 thin films feature a room temperature DC conductivity of around 31μΩm. SrMoO3 is characterized in the THz frequency range by time domain spectroscopy. The resulting AC conductivity is in excellent agreement with the DC value. A Lorentz-Drude oscillator approach models the THz and visible conductivity of SrMoO3 very well. We compare the results of the SrMoO3 thin films to a standard, sputtered gold film, with a resulting THz conductivity of 81μΩm. The comparison demonstrates that oxide thin film–based devices can play an important role in future THz technology.

Item Type: Article
Erschienen: 2020
Creators: Regensburger, Stefan and Mohammadi, Mahdad and Khawaja, Arslan A. and Radetinac, Aldin and Komissinskiy, Philipp and Alff, Lambert and Preu, Sascha
Title: Optical Properties of Highly Conductive SrMoO3 Oxide Thin Films in the THz Band and Beyond
Language: English
Abstract:

Strontium molybdate (SrMoO3) thin films are grown epitaxially by pulsed laser deposition onto gadolinium scandate (GdScO3) substrates and characterized in the terahertz (THz) and visible part of the electromagnetic spectrum. X-ray diffraction measurements prove a high crystallinity and phase-pure growth of the thin films. The high-quality SrMoO3 thin films feature a room temperature DC conductivity of around 31μΩm. SrMoO3 is characterized in the THz frequency range by time domain spectroscopy. The resulting AC conductivity is in excellent agreement with the DC value. A Lorentz-Drude oscillator approach models the THz and visible conductivity of SrMoO3 very well. We compare the results of the SrMoO3 thin films to a standard, sputtered gold film, with a resulting THz conductivity of 81μΩm. The comparison demonstrates that oxide thin film–based devices can play an important role in future THz technology.

Journal or Publication Title: Journal of Infrared, Millimeter, and Terahertz Waves
Journal volume: 41
Number: 10
Publisher: Springer
Uncontrolled Keywords: SrMoO3, GdScO3, Perovskite, Conductive thin film, THz spectroscopy
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics > Terahertz Systems Technology
Date Deposited: 15 Jun 2020 07:55
DOI: 10.1007/s10762-020-00697-z
Official URL: https://link.springer.com/article/10.1007/s10762-020-00697-z...
Projects: Open Access funding provided by Projekt DEAL., This research is supported by Profilbereich PMP from TU Darmstadt and by the Deutsche Forschungsgemeinschaft (DFG) as part of the Project No. KO 4093/1-4.
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