Artificial multiple helices: polarization and EM properties

Wongkasem, Nantakan; Kamtongdee, Chakkrit; Akyurtlu, Alkim; Marx, Kenneth A.

doi:10.1088/2040-8978/12/7/075102

Cited by 14 publications

(21 citation statements)

References 19 publications

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“…The SRR type metamaterials can be used to create strong magnetic coupling among the EM fields which cannot be available in conventional methods. There are some studies realizing magnetic resonances by using different SRR configurations in literature [3][4][5][6][7][8][9][10][11][12]. SRR topology consists of more than one coupled SRR unit cell.…”

Section: Introductionmentioning

confidence: 99%

Chiral Metamaterial Based Multifunctional Sensor Applications

Karaaslan¹,

Bakır²

2014

PIER

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Abstract-In this work, sensor abilities of a chiral metamaterial based on split ring resonators with double splits (SRDS) are demonstrated both theoretically and experimentally in X band range. This study is based on transmission measurements and simulations monitoring the resonance frequency changes with respect to the thickness of the sensing layer and permittivity values. Experimental and simulated results show that the resonance frequency of the chiral metamaterial based SRDS sensor is linearly related to the permittivity and the thickness of the sensor layer which creates a suitable approach for sensing environment and organic parameters. When the sensor layer filled with the related material, changes in the tissue temperature, sand humidity and calcium chloride density lead to resonance frequency changes. The physical mechanisms are explained by using both equivalent circuit model and the fundamental sensitivity theorem of chiral sensors. This is the first study investigating a sensing mechanism based on the chiral metamaterials in X band range.

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Section: Introductionmentioning

confidence: 99%

Chiral Metamaterial Based Multifunctional Sensor Applications

Karaaslan¹,

Bakır²

2014

PIER

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“…More recently, negative refractive index of 3 dimensional compact helix structures also has been investigated in microwave frequency [25][26][27], however, which is hard to fabricate and integrate into present systems, especially in teraherz (THz) and optical region. THz is a unique frequency range which has attracted significant attention due to its potential applications in sensing, biomedical imaging, and wireless communication, among others [5,28].…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Terahertz Chiral Metamaterial With Giant Optical Activity and Negative Refractive Index Based on Cross-Wire Strucure

Fang¹,

Cheng²

2013

PIER M

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Abstract-In this paper, a dualband chiral metamaterial (CMM) based on cross-wire structure is proposed and studied numerically. It exhibits dual-band giant optical activity and negative refractive index in terahertz region. The surface current distributions are calculated to explain original physics. The further numerical results show that the effective frequency bands of the CMMs can be independent adjusted easily by changing the structure geometrical parameter. The designed dual-band terahertz CMMs offer flexibility in the investigation of novel terahertz device application.

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“…Meanwhile, the factors determining the sign of phase velocity in CMMs, such as permittivity, permeability, and chirality parameters, are discussed in detail. Figure 1 gives the schematic representation of one unit cell of four kinds of typical CMMs, that is, double-layered rosettes [24], helices [25], 2D chiral split ring resonators [26], and cross-wire structure [5]. These elemental unit cells cannot be superimposed on their mirror images.…”

Section: Introductionmentioning

confidence: 99%

The effect of media parameters on wave propagation in a chiral metamaterials slab using FDTD

Wang

Zhou

et al. 2013

Int J Numerical Modelling

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SUMMARY Because the permittivity, permeability, and chirality parameters of chiral metamaterials (CMMs) are frequency dependent, the wave equations that describe the characters of electromagnetic wave propagation in CMMs are presented and discretized on the basis of auxiliary differential equation technique in finite‐difference time‐domain method. The total‐field/scattered‐field, Mur's first‐order absorbing and dielectric boundary conditions for CMMs slab are discussed in the paper. Numerical results show that the cross‐polarized reflected coefficient of the CMMs slab is zero. Negative index of refraction phenomenon and optical property of giant optical activity in CMMs slabs are illustrated with 1D auxiliary differential equation–finite‐difference time‐domain method. The effects to positive or negative phase velocity caused by media parameters of CMMs are studied. Copyright © 2013 John Wiley & Sons, Ltd.

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Artificial multiple helices: polarization and EM properties

Cited by 14 publications

References 19 publications

Chiral Metamaterial Based Multifunctional Sensor Applications

Chiral Metamaterial Based Multifunctional Sensor Applications

Dual-Band Terahertz Chiral Metamaterial With Giant Optical Activity and Negative Refractive Index Based on Cross-Wire Strucure

The effect of media parameters on wave propagation in a chiral metamaterials slab using FDTD

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