Circuit Analysis in Metal-Optics

Abstract

We provide electrical circuit descriptions for bulk plasmons, single surface plasmons, and parallel-plate plasmons. Simple circuits can reproduce the exactly known frequency versus wave-vector dispersion relations for all these cases, with reasonable accuracy. The circuit paradigm directly provides a characteristic wave-impedance, Zo, that is rarely discussed in the context of plasmonics. The case of a single-surface-plasmon is particularly interesting since it can be modeled as a transmission line, even though there is no return current conductor. The capacitance/unit length and the Faraday inductance/unit length, of a flat metal surface, are C'=2epsilon_okW, and L'=epsilon_o/2kW respectively, (where k is wave-vector, and W is the width of the flat metal surface). We believe that many other metal-optic geometries can be described within the circuit paradigm, with the prerequisite that the distributed capacitance and inductance must be calculated for each particular geometry

References in corpus (4)

• Circuit elements at optical frequencies: nano-inductors, nano-capacitors and nano-resistors
• Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical Nanoantennas
• Optical Nanotransmission Lines: Synthesis of Planar Left-Handed Metamaterials in the Infrared and Visible Regimes
• Study of plasmon resonance in a gold nanorod with an LC circuit model

Cited by in corpus (9)

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• Terajets produced by 3D dielectric cuboids
• Generalized circuit model for coupled plasmonic systems
• The resonant dynamics of arbitrarily-shaped meta-atoms
• Asymptotic network models of subwavelength metamaterials formed by closely packed photonic and phononic crystals
• Supersymmetric correspondence in spectra on a graph and its line graph: From circuit theory to spoof plasmons on metallic lattices
• Coupled-wave surface-impedance analysis of extraordinary transmission through single and stacked metallic screens
• Optical LC-like resonances in high-index particles
• Hyperpolarizability of plasmonic meta-atoms in metasurfaces