Novel Broadband Terahertz Negative Refractive Index Metamaterials: Analysis and Experiment

Wongkasem, Nantakan; Akyurtlu, Alkim; Li, Jin; Tibolt, Adam; Kang, Zeng; Goodhue, W. D.

doi:10.2528/pier06071104

Cited by 44 publications

(24 citation statements)

References 21 publications

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“…Since the beginning of the proposal of MMs, SRR has played an important role in achieving negative permeability, negative refractive index, coupling effect and other exotic phenomena [30][31][32][33][34][35][36][37][38][39]. The two mutually twisted SRRs also can be formed a magnetic dimer possessing optical activity [39].…”

Section: Physical Model Simulation and Experimentsmentioning

confidence: 99%

Giant Circular Dichroism and Negative Refractive Index of Chiral Metamaterial Based on Split-Ring Resonators

Cheng¹,

Nie²,

Wu³

et al. 2013

PIER

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Abstract-In this paper, a double-layer split-ring resonator structure chiral metamaterial was proposed which could exhibit pronounced circular dichroism (CD) effect and negative refractive index at microwave frequencies. Experiment and simulation calculations are in good agreement. The retrieved effective electromagnetic parameters indicate that the lower frequency CD effect is associated with the negative refractive index property of the left circularly polarized (LCP) wave, and the upper one is to the right circularly polarized (RCP) wave. The mechanism of the giant CD effect could be further illustrated by simulated surface current and power loss density distributions.

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Section: Physical Model Simulation and Experimentsmentioning

confidence: 99%

Giant Circular Dichroism and Negative Refractive Index of Chiral Metamaterial Based on Split-Ring Resonators

Cheng¹,

Nie²,

Wu³

et al. 2013

PIER

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“…The conductivity greatly influences the dielectric [3][4][5][6][7] and magnetic behavior of ferrites [8,9]. This created considerable interest in many research workers for the development and potential applications of ferrites in the electronic industry [10][11][12]. Now a days the study of ferrites has occupied an important place in the electronics technology [13].…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF TIME AND TEMPERATURE ON RESISTIVITY AND MICROSTRUCTURE OF Cux Co1-x Fe2 O4 MIXED FERRITES

Bammannavar¹,

Naik²,

Pujar³

et al. 2008

PIER Letters

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Abstract-Copper-cobalt ferrites with general chemical formula Cu x Co 1−x Fe 2 O 4 (with x = 0.0, 0.4, 0.6 & 1.0) were prepared by ceramic method. The solid state reaction was confirmed by XRD patterns. DC conductivity was measured by two probe method. Electrical resistivity is found to increase on lowering of sintering temperature and time. At x = 1.0, the conduction is mainly due to hopping of electrons leading to n-type conductivity while at x = 0.0, conduction is due to holes leading to P-type conductivity. The lowest conduction at x = 0.4 is attributed to the electron hole compensation. SEM micrographs were obtained from JEOL scanning electron microscope. The micrographs reveal that an average grain size increases with sintering temperature and time as a result of decrease in porosity. This leads to the decrease in resistivity with sintering temperature and time. One of the factors for higher conductivity in ferrites is an increase in average grain size and decrease in pore concentration during the heat treatment.

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“…In order to get a large or negative lateral shift, many attempts have been made with various materials and configurations, such as dielectric slabs [14][15][16][17], metal surfaces [18][19][20], dielectricchiral surface [21], multilayered structures [22], metallic gratings [23], and photonic crystals [24]. Recently, left-handed metamaterial with negative permeability and permittivity has attracted a lot of attention due to their extraordinary electromagnetic characteristics [25][26][27][28][29][30][31][32], and negative lateral shift has been observed in left-handed materials [33][34][35][36][37]. In those works, the case for the isotropic left-handed material has been analyzed extensively.…”

Section: Introductionmentioning

confidence: 99%

Lateral Displacement of an Electromagnetic Beam Reflected From a Grounded Indefinite Uniaxial Slab

Kong¹,

Wu²,

Huang³

et al. 2008

PIER

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Abstract-A theoretical analysis of the lateral shift for an electromagnetic beam reflected from an uniaxial anisotropic slab coated with perfect conductor is presented. The analytic expression for the lateral shift is derived by using the stationary-phase approach, and the conditions for negative and positive lateral shifts are discussed. It is shown that the lateral shift depends not only on the slab thickness and the incident angle, but also on the constitutive parameters of the uniaxial medium. Enhancement and suppression of lateral shift are observed and are attributed to the interference between the reflected

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Novel Broadband Terahertz Negative Refractive Index Metamaterials: Analysis and Experiment

Cited by 44 publications

References 21 publications

Giant Circular Dichroism and Negative Refractive Index of Chiral Metamaterial Based on Split-Ring Resonators

Giant Circular Dichroism and Negative Refractive Index of Chiral Metamaterial Based on Split-Ring Resonators

INFLUENCE OF TIME AND TEMPERATURE ON RESISTIVITY AND MICROSTRUCTURE OF Cu<sub>x</sub> Co<sub>1-x</sub> Fe<sub>2</sub> O<sub>4</sub> MIXED FERRITES

Lateral Displacement of an Electromagnetic Beam Reflected From a Grounded Indefinite Uniaxial Slab

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