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April 15-16, 2019 | Frankfurt, Germany
Applied Physics & Laser, Optics and Photonics
International Conference on
Materials Science and Nanotechnology | Volume: 3
H-shaped fishnet metamaterial sensor for sub-terahertz region
Cumali Sabah
and
Ahmet Faruk
Middle East Technical University - Northern Cyprus Campus (METU-NCC), Turkey
T
erahertz regionprovidesus lotsof advantagesand
the number of devices that are using THz waves
is increasing day by day. Metamaterials are artificial
materials which can help us to do unachievable
goals by their exotic electromagnetic properties.
Metamaterials are started to be used widely in
different devices like lenses, antennas, modulators
and sensors and THz region is one of the most
contributed region of electromagnetic spectrum
by metamaterials. In this study we design a fishnet
metamaterial sensor that can detect materials from
their electromagnetic properties and also can detect
the thickness of that material by using THz waves.
The proposed design is unique and both side of
the sensor can be used for sensing which increases
the efficiency and for some cases applicability
of the sensor. Firstly frequency resonances were
found and from the surface current and electric
field distributions the theory behind the frequency
resonances has been described. The material that
is going to be detected was added to the structure
as single and double overlayer and the frequency
shifts at the resonance have been observed against
different dielectric constant and thickness values. The
material that is going to be detected can be detected
from that frequency shift values. The sensitivity of
the proposed sensor was calculated and compared
with the existing ones and the applicability of the
sensor is proved.
e
:
sabah@metu.edu.trFigure 1. Front view and side view of proposed structure
Figure 2. Frequency shift of Fishnet MTM versus Double
and Single overlayer thickness with the fitted curves