Three-dimensional artificial double helices with high negative refractive index

Sonsilphong, Amornthep; Wongkasem, Nantakan

doi:10.1088/2040-8978/14/10/105103

Cited by 12 publications

(11 citation statements)

References 22 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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“…4-circular double SRRs with different dimensions have been designed for multi-bands in order to optimize the permittivity characterization [1]. Hence, different MTM structure types, for instance, negative refraction index (NRI) MTMs [42][43][44]52], chiral MTMs [4,[45][46][47], and near-zeroindex (NZI) MTMs [48,49], can be additional choices, where more parameters can be manipulated.…”

Section: Introductionmentioning

confidence: 99%

Multi-Negative Index Band Metamaterial-Inspired Microfluidic Sensors

Wongkasem¹,

Ruiz²

2019

PIER C

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Simple, compact and high sensitivity metamaterial-inspired microfluid sensors are developed to detect and classify dielectric fluids in the X-band regime using reflection coefficients. Multinegative refractive index band metamaterial structure is specifically designed as a sensing enhancer, where the multi-negative bands can effectively trigger the electromagnetic properties, as well as enhance the differentiation between the testing samples. The geometry of the metamaterial enhancer and its arrangement with the microfluidic channel and radiating patch antenna are optimized to reach the highest sensitivity of the samples' depiction. The proposed sensors were tested on ethanol traces, where sets of complex permittivity were varied. Distinguishable frequency responses generated from different samples at four resonances specify the capability of classifying the fluid concentration.

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Three-dimensional artificial double helices with high negative refractive index

Cited by 12 publications

References 22 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

Multi-Negative Index Band Metamaterial-Inspired Microfluidic Sensors

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