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

Journal Article · · Journal of Physics. D, Applied Physics

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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1481152
Report Number(s):
LA-UR-18-29547
Journal Information:
Journal of Physics. D, Applied Physics, Vol. 51, Issue 5; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (3)

Dynamic Terahertz Plasmonics Enabled by Phase‐Change Materials journal August 2019
A thermally tunable THz metamaterial frequency-selective surface based on barium strontium titanate thin film journal November 2018
Tunable strontium titanate terahertz all-dielectric metamaterials journal February 2020

Figures / Tables (4)