Flexible chiral metamaterials with dynamically optical activity and high negative refractive index

Date

2015-07-10

Author

Dincer, Furkan
KARAASLAN, MUHARREM
ÜNAL, EMİN
Akgol, Oguzhan
Sabah, Cumali

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

147
views

0
downloads

We demonstrate numerically and experimentally chiral metamaterials (MTMs) based on gammadion-bilayer cross-wires that uniaxially create giant optical activity and tunable circular dichroism as a result of the dynamic design. In addition, the suggested structure gives high negative refractive index due to the large chirality in order to obtain an efficient polarization converter. We also present a numerical analysis in order to show the additional features of the proposed chiral MTM in detail. Therefore, a MTM sensor application of the proposed chiral MTM is introduced and discussed. The presented chiral designs offer a much simpler geometry and more efficient outlines. The experimental results are in a good agreement with the numerical simulation. It can be seen from the results that, the suggested chiral MTM can be used as a polarization converter, sensor, etc. for several frequency regimes.

Subject Keywords

Chiral netamaterial, Sensor, Chirality, Optical activity

URI

https://hdl.handle.net/11511/68108

Journal

MODERN PHYSICS LETTERS B

DOI

https://doi.org/10.1142/s0217984915500876

Collections

Engineering, Article

Suggestions

OpenMETU
Core

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 ...
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...
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...
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...
Coarse-to-fine surface reconstruction from silhouettes and range data using mesh deformation Sahillioğlu, Yusuf; Yemez, Y. (2010-03-01) We present a coarse-to-fine surface reconstruction method based on mesh deformation to build watertight surface models of complex objects from their silhouettes and range data. The deformable mesh, which initially represents the object visual hull, is iteratively displaced towards the triangulated range surface using the line-of-sight information. Each iteration of the deformation algorithm involves smoothing and restructuring operations to regularize the surface evolution process. We define a non-shrinking...

Citation Formats

F. Dincer, M. KARAASLAN, E. ÜNAL, O. Akgol, and C. Sabah, “Flexible chiral metamaterials with dynamically optical activity and high negative refractive index,” MODERN PHYSICS LETTERS B, pp. 0–0, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68108.