Mode filtering aspects of periodic multilayered chiro-ferrite medium

Iqbal, Naeem; Choudhury, Pankaj Kumar

doi:10.1016/j.ijleo.2017.11.049

“…Wide-bandwidth structures have been useful in many applications, such as multiplexers, absorbers, filters etc. [6,14,[33][34][35]. Researchers have been involved in designing composite mediums and/or engineered structures that can exhibit wide-band features.…”

Section: Revised Manuscriptmentioning

confidence: 99%

“…The propagation of electromagnetic waves through periodic structures have been of great importance as these exhibit photonic band-gaps where photons of particular frequencies cannot propagatethe feature that can be harnessed for multifarious technological applications, such as designing optical sensors, narrow-band optical sources, optical filters, one-dimensional (1D) photonic crystals, etc. [1][2][3][4][5][6][7][8]. Some other applications would include storage devices, solar cells, resonators, optical buffers and time-division multiplexers [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer

Pourmand

¹

,

Choudhury

²

2020

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Investigation of the spectral response of graphene-dielectric (SiO 2 )-based periodic structure was made in the far-infrared (IR) to the mid-IR frequency range, and the effects of different parametric and operational conditions on the transmission characteristics were explored. The presence of stop-bands, followed by Bragg reflection harmonics, in the low-frequency regime was observed exploiting the bilayer graphene (BLG) sheets. The width of stop-bands could be tuned by altering the number of periods as well as the chemical potential of BLG. The formation of a stop-band (with a transmission dip positioned at ~16 THz) having a span of ~3 THz was noticed, which is possibly a very large stop-bandwidth reported so far. The structure was also analyzed upon introducing a defect layer of MgF 2 having a thickness smaller than the dielectric medium. This results in shifting the position of stop-bands of the structure. The characteristics of transmission spectra were found to be greatly depending on the chemical potential (of BLG) and other operating conditionsthe feature that triggers the usefulness of the proposed structure in the design of optical modulators, tunable narrow-band filters and broad-band reflectors.

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Electromagnetic Materials

Choudhury

2024

Encyclopedia of RF and Microwave Engineering

0

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This article describes the electromagnetic properties of certain types of mediums or materials in which the process of electromagnetics takes place. The introductory part discusses the evolution of electromagnetics based on theories and experiments by the pioneering scientists in the past. The following portions of the article deal with the different types of mediums, including isotropic and anisotropic dielectrics, conductors, semiconductors, superconductors, electrooptic, and optically active mediums. The fundamentals of magnetic materials are described in greater detail, explaining the mechanisms of magnetization and special materials such as ferrites. Bianisotropic materials and their constitutive equations are also discussed. Here, the focus is on some of the fundamental aspects of the constitutive characterization of bianisotropic mediums. The last three sections describe the basics and important applications of the phenomena of magnetostriction, piezoelectricity, and metamaterials.

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Electromagnetic Materials

Choudhury

2024

Encyclopedia of RF and Microwave Engineering

0

View full text Add to dashboard Cite

This article describes the electromagnetic properties of certain types of mediums or materials in which the process of electromagnetics takes place. The introductory part discusses the evolution of electromagnetics based on theories and experiments by the pioneering scientists in the past. The following portions of the article deal with the different types of mediums, including isotropic and anisotropic dielectrics, conductors, semiconductors, superconductors, electrooptic, and optically active mediums. The fundamentals of magnetic materials are described in greater detail, explaining the mechanisms of magnetization and special materials such as ferrites. Bianisotropic materials and their constitutive equations are also discussed. Here, the focus is on some of the fundamental aspects of the constitutive characterization of bianisotropic mediums. The last three sections describe the basics and important applications of the phenomena of magnetostriction, piezoelectricity, and metamaterials.

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Mode filtering aspects of periodic multilayered chiro-ferrite medium

Cited by 8 publications

References 24 publications

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer

Electromagnetic Materials

Electromagnetic Materials

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Mode filtering aspects of periodic multilayered chiro-ferrite medium

Cited by 8 publications

References 24 publications

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF2 Defect Layer

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF2 Defect Layer

Electromagnetic Materials

Electromagnetic Materials

Contact Info

Product

Resources

About

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer