Browsing by Author "Takan, Taylan"

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Citation - Scopus: 1
Cleo®/Europe - Eqec 2015, an Indium Tin Oxide Metamaterial Filter for the Terahertz Regime: Design, Fabrication and Characterization
(Optical Society of America (OSA), 2015) Takan, Taylan; Nebioğlu, Mehmet Ali; Kurt, Metin; Demirhan, Yasemin; Özyüzer, Lütfi; Sabah, Cumali; Altan, Hakan; 04.05. Department of Pyhsics; 01. Izmir Institute of Technology; 04. Faculty of Science
[No abstract available]
Citation - WoS: 6
Citation - Scopus: 6
An Indium Tin Oxide Metasurface Filter for Terahertz Applications: Design, Fabrication, and Characterization
(World Scientific Publishing Co. Pte Ltd, 2017-03) Nebioğlu, Mehmet Ali; Takan, Taylan; Altan, Hakan; Demirhan, Yasemin; Alaboz, Hakan; Özyüzer, Lütfi; Sabah, Cumali; 04.05. Department of Pyhsics; 04. Faculty of Science; 01. Izmir Institute of Technology
In this paper, using a cross-shaped complementary Indium Tin Oxide (ITO)-based metasurface design, the transmission of THz radiation is shown to be filtered within the 3 dB level from maximum in the frequency range of interest (333 GHz). Various metasurface structures primarily composed of cross-shaped openings with a 400 micron unit cell size are patterned on top of 1750 micron thick fused silica substrates. They are patterned using UV lithography methods after the films were grown using DC sputtering. The fabricated structures were characterized using Terahertz Time Domain Spectroscopy (THz-TDS) measurement technique. The measured transmission agrees well with the simulation of the structure for four different samples with different geometries. These results suggest that metasurface and/or metamaterial patterns based on ITO in visibly transparent media can be utilized for filtering of frequencies in the long wavelength spectrum. These types of filters can be very useful in the near future for THz communication and security applications. ©
Citation - WoS: 11
Citation - Scopus: 13
Metal Mesh Filters Based on Ti, Ito and Cu Thin Films for Terahertz Waves
(Springer Verlag, 2016-02-01) Demirhan, Yasemin; Alaboz, Hakan; Özyüzer, Lütfi; Nebioğlu, Mehmet Ali; Takan, Taylan; Altan, Hakan; Sabah, Cumali; 04.05. Department of Pyhsics; 04. Faculty of Science; 01. Izmir Institute of Technology
In this study, we have investigated the spectral performance of resonant terahertz (THz) bandpass filters which were produced from thin films with a metal-mesh shape. The aforementioned filters were fabricated from titanium, copper and indium tin oxide thin films on fused silica substrates by UV lithography with an array of cross-shaped apertures. Since the mesh period, cross-arm length and its width specify the spectral characteristics of the filters, we were able to reveal the performance of these filters experimentally using both a THz time domain spectrometer and a Fourier transform infrared spectrometer. A commercial electromagnetic simulation software, CST microwave studio, was used to verify the experimental data. The transmission of the filters are in the range 20–55 % at their relevant center frequencies. To our knowledge this study is the first to show that fabricated patterns based on ITO thin films can be used to filter THz radiation.