Systematic Analysis on the Optical Properties of Chiral Metamaterial Slab for Microwave Polarization Control

2015-05-01
Comez, I.
KARAASLAN, MUHARREM
Dincer, F.
KARADAĞ, FATOŞ
Sabah, C.
Theoretical and numerical of investigation of the chiral slab exhibiting polarization rotation is presented in detail. The effects of the chirality, thickness of medium, dielectric constant, and incident angle are analyzed in order to display the characteristic features of the chiral slab both for TE and TM incident waves. The chiral slab then is realized by using a full wave EM simulation software in order to validate the numerical results in which the numerical and simulation results are in good agreement with each other. Different than the other studies existing in literature, the proposed model shows optimum results for wide frequency band by using small chirality which is sufficient for polarization rotation. From the results, it is observed that the proposed system and its realization can be effectively used as a polarization converter and EM filters at some frequencies.
APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL

Suggestions

90 degrees Polarization rotator and antireflector using meanderline chiral metamaterials: Analytical and numerical approach
Gonulal, Sengul; KARAASLAN, MUHARREM; ÜNAL, EMİN; DELİHACIOĞLU, KEMAL; Dincer, Furkan; TETİK, ERKAN; Sabah, Cumali (2015-01-01)
We demonstrate theoretically and numerically a chiral slab that can exhibit optical activity, circular dichroism, and antireflection in detail. Copolar and crosspolar transmitted and reflected waves depending on permittivity, chirality and thickness are analyzed in order to display the characteristic features of the proposed chiral slab both for TE and TM incident waves. The suggested chiral slab is realized by a commercial full-wave EM solver to confirm theoretical results. From the results, the theoretica...
Modelling and experimental study of titanosilicate ets-10 : application for solar cells
Koç, Mehmet; Akata Kurç, Burcu; Toffoli, Hande; Department of Micro and Nanotechnology (2013)
Density functional theory (DFT) calculations within the gradient-corrected approximation (GGA) have been carried out on three models of ETS-10 with the aim to elucidate the effect of ion exchange on the structural, electronic and vibrational properties of the Ti-O-Ti quantum wire. Our data are reveal the presence of two inequivalent Ti-O bonds along the chain in the ETS-10 sodium form, in agreement with past theoretical and experimental studies. The nature and spectral position of the ligand-to-metal charge...
Asymmetric transmission of linearly polarized electromagnetic waves using chiral metamaterials with constant chirality over a certain frequency band
Akgöl, Oğuzhan; Dinçer, Furkan; Karaaslan, Muharrem; Ünal, Emin; Sabah, Cumali (World Scientific Pub Co Pte Lt, 2014-12-30)
In this study, a dynamic chiral metamaterial (MTM) structure leading to an asymmetric electromagnetic (EM) wave transmission for linear polarization is presented. The structure is composed of square-shaped resonator with gaps on both sides of a dielectric substrate with a certain degree of rotation. The dynamic structure is adjustable via various parameters to fit any desired frequency ranges. Theoretical and experimental analysis of the proposed structure are conducted and given in detail. The suggested mo...
Full-Wave Computational Analysis of Optical Chiral Metamaterials
Guler, Sadri; Solak, Birol; Gür, Uğur Meriç; Ergül, Özgür Salih (2017-09-27)
We present computational analysis of optical chiral metamaterials that consist of helical metallic elements. At optical frequencies, metals are modeled as penetrable objects with plasmonic properties. A rigorous implementation based on boundary element methods and the multilevel fast multipole algorithm is used for efficient and accurate analysis of three-dimensional structures. Numerical results demonstrate interesting polarization-rotating characteristics of such arrays with helical elements, as well as t...
Dynamic and tunable chiral metamaterials with wideband constant chirality over a certain frequency band
Dincer, Furkan; KARAASLAN, MUHARREM; AKGÖL, OĞUZHAN; ÜNAL, EMİN; Sabah, Cumali (2015-01-01)
We present numerically and experimentally a dynamic chiral metamaterial (MTM) that creates strong optical activity and circular dichroism. The proposed tunable structure has a very simple and more efficient configuration which introduces flexibility to adjust its EM properties. In addition, it gives a giant negative refractive index due to the high chirality. Our experimental results confirm the strong optical activity for a wide frequency range and agree with the simulation results. Moreover, the proposed ...
Citation Formats
I. Comez, M. KARAASLAN, F. Dincer, F. KARADAĞ, and C. Sabah, “Systematic Analysis on the Optical Properties of Chiral Metamaterial Slab for Microwave Polarization Control,” APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL, pp. 478–487, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67995.