Electric-field tuning of a planar terahertz metamaterial based on strained SrTiO3 layers

Kadlec, Christelle; Skoromets, Volodymyr; Kadlec, Filip; Němec, Hynek; Chen, Hou -Tong; Jurka, Vlastimil; Hruška, Karel; Kužel, Petr

doi:10.1088/1361-6463/aaa315

Electric-field tuning of a planar terahertz metamaterial based on strained SrTiO₃ layers

Journal Article · Wed Jan 10 23:00:00 EST 2018 · Journal of Physics. D, Applied Physics

DOI:https://doi.org/10.1088/1361-6463/aaa315· OSTI ID:1481152

^[1]; Skoromets, Volodymyr ^[1]; ^[1]; ^[1]; ^[2]; Jurka, Vlastimil ^[1]; Hruška, Karel ^[1]; Kužel, Petr ^[1]

Czech Academy of Sciences, Prague (Czech Republic)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, we demonstrate a metamaterial exhibiting a frequency-tunable response in the terahertz domain, controlled by a bias electric field. The active part of the metamaterial consists of a periodic metallic pattern deposited on a thin epitaxially strained strontium titanate film. The role of the metallic structure is two-fold: it gives rise to the metamaterial resonance and it enables applying an electric bias to the strontium titanate layer. The strained film exhibits a pronounced dependence of its permittivity on the bias, which exerts a strong influence on the resonance. Specifically, the resonance of our structure occurs near 0.5 THz and, upon applying a bias voltage of 55 V, a relative tunability of the resonance frequency of 19% was achieved at room temperature.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1481152

Alternate ID(s):: OSTI ID: 23088852

Report Number(s):: LA-UR--18-29547

Journal Information:: Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Journal Issue: 5 Vol. 51; ISSN 0022-3727

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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