Influence of nanoparticle height on plasmonic resonance wavelength and electromagnetic field enhancement in two-dimensional arrays

The Wound Foil Inductor is an important example of inductive components with appreciable internal capacitance. It is examined from three viewpoints – electromagnetic field theory, distributed-parameter (or transmission-line), and lumped equivalent circuit. The analyses are compared, particularly in terms of phase gradients within a component, and the relationship between a two-dimensional field analysis and the now established lumped model is derived.

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Nonlinear Modulation of Plasmonic Resonances in Graphene-Integrated Triangular Dimers at Terahertz Frequencies

Materials ◽

10.3390/ma12152466 ◽

2019 ◽

Vol 12 (15) ◽

pp. 2466

Author(s):

Quan Li ◽

Shuang Wang ◽

Tai Chen

Keyword(s):

Strong Field ◽

Field Enhancement ◽

Subwavelength Structures ◽

Plasmonic Resonance ◽

Nonlinear Conductivity ◽

Resonance Modes ◽

Terahertz Frequencies ◽

Terahertz Sensing ◽

Nonlinear Modulation ◽

A Charge

Metamaterials made from artificial subwavelength structures hold great potential in designing functional devices at microwave, terahertz, infrared, and optical frequencies. In this work, we study the active switching effect of the plasmonic resonance modes in triangular dimer (DTD) structure using graphene in the terahertz regime. The sole DTD structure can only support a dipolar bonding dimer plasmonic (BDP) mode, whose field enhancement factor at the gap center can reach 67.4. However, with a metallic junction in the dimer, the BDP mode switches to a charge transfer plasmonic (CTP) mode. When changing the metallic junction to a graphene stripe, an active modulation effect of the CTP mode can be realized by altering the nonlinear conductivity of graphene through strong-field terahertz incidence. The proposed design is quite promising in terahertz sensing, amplitude switching and nonlinear effect enhancement, etc.

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Bound state in a model of electromagnetic field interacting with a material plan

Modern Physics Letters A ◽

10.1142/s0217732320501709 ◽

2020 ◽

Vol 35 (21) ◽

pp. 2050170

Author(s):

Yu. M. Pismak ◽

D. Shukhobodskaia

Keyword(s):

Electromagnetic Field ◽

Maxwell Equations ◽

Singular Potential ◽

Bound State ◽

Material Object ◽

Two Dimensional ◽

Isotropic Plane ◽

Chern Simons ◽

Material Plane ◽

State Of Field

In the model with Chern-Simons potential describing the coupling of electromagnetic field with a two-dimensional material, the possibility of the appearance of bound field states, vanishing at sufficiently large distances from interacting with its macro-objects, is considered. As an example of such two-dimensional material object we consider a homogeneous isotropic plane. Its interaction with electromagnetic field is described by a modified Maxwell equation with singular potential. The analysis of their solution shows that the bound state of field cannot arise without external charges and currents. In the model with currents and charges the Chern-Simons potential in the modified Maxwell equations creates bound state in the form of the electromagnetic wave propagating along the material plane with exponentially decreasing amplitude in the orthogonal to its direction.

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The half-plane diffraction problem for harmonic time dependence

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1959.0161 ◽

1959 ◽

Vol 252 (1270) ◽

pp. 411-417 ◽

Cited By ~ 1

Keyword(s):

Electromagnetic Field ◽

Time Dependence ◽

Boundary Value Problems ◽

Half Plane ◽

Mixed Type ◽

Boundary Value ◽

Diffraction Problem ◽

Two Dimensional ◽

Conducting Screen ◽

Plane Diffraction

Green’s functions are obtained for the boundary-value problems of mixed type describing the general two-dimensional diffraction problems at a screen in the form of a half-plane (Sommerfeld’s problem), applicable to acoustically rigid or soft screens, and to the full electromagnetic field at a perfectly conducting screen.

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