90° Polarization rotator and antireflector using meanderline chiral metamaterials: Analytical and numerical approach

Gonulal, Sengul; Karaaslan, Muharrem; Ünal, Emın; Delihacioglu, Kemal; Dinçer, Furkan; Tetik, Erkan; Sabah, Cumalı

doi:10.1016/j.ijleo.2015.09.017

Cited by 2 publications

(4 citation statements)

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“…Generally, it is difficult to realize a linear polarization rotation up to 90 • with a high efficiency of crosspolarization conversion in previous CMM based on the mutual twisted resonator structures [7,14,15,[22][23][24][25][26][27][28]. Another CMM based on some longitudinal magnetic dipole coupling has been proposed to get strong rotatory strength [13,[34][35][36].…”

Section: Unit-cell Structure Design Simulation and Experimentsmentioning

confidence: 99%

“…Generally, the giant polarization rotation realized with CMM is several orders of magnitude larger than that of conventional natural materials. Compared with conventional devices or methods [16,17], CMM has several advantages, such as flexible manipulation range of the operation wavelength and high efficiency, revealing that it is very suitable for polarization manipulation [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…Significant efforts have been devoted to the realization of various CMMs in converting or rotating the polarization of EM wave with high efficiency [22][23][24][25][26][27][28][29][30][31]. Essentially, these special CMMs structures for polarization rotations or conversions with high efficiency mainly originate from their extrinsic chirality induced by the EM coupling effects.…”

Section: Introductionmentioning

confidence: 99%

“…These CMMs structures have been proposed to obtain cross polarization waves in transmission, which can exhibit cross polarization conversion or giant optical activity by 90 • linear polarization rotation [32][33][34][35][36]. These CMMs structures are usually constructed by bi-layered or triple-layered enantiomeric metallic patterns sandwiched with dielectric substrates [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. However, these CMM structures are not transversely isotropic, usually working with a very low cross-polarization transmission, single frequency band or polarization angle dependent response.…”

Section: Introductionmentioning

confidence: 99%

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Triple-Band Polarization Angle Independent 90° Polarization Rotator Based on Fermat's Spiral Structure Planar Chiral Metamaterial

Cheng¹,

Li²,

Mao³

2019

PIER

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We propose a planar chiral metamaterial (PCMM), which can function as a triple-band polarization angle independent 90 • polarization rotator. The unit cell of the PCMM is composed of bi-layered mutual twisted Fermat's spiral structure (FSS) resonators with four-fold rotation symmetry. The simulated and measured results show that the PCMM can work in triple-band and convert a linearly polarized (y-/x-polarized) wave to its cross-polarization (x-/y-polarized) or experience a near 90 • polarization rotation with a polarization conversion ratio of over 90%. The electric field and surface current distributions of the unit-cell structure are analyzed to study its physics mechanism. Compared with previous CMM-based rotator, our design has more operation frequencies in a single PCMM structure, a relative thinner thickness, and higher Q-factor. Good performances of the PCMM suggest promising applications in the polarization rotator or convertor that need to be integrated with other compact devices.

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