Numerical study of optical absorption in two-dimensional metal-insulator and normal-superconductor composites

X. C. Zeng, P. M. Hui, D. Stroud

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

We analyze a random resistor-inductor-capacitor (RLC) lattice model for the optical properties of a two-dimensional normal-metal insulator composite, using the Y-" transformation algorithm developed by Frank and Lobb. Within such a model, the surface plasmon resonances of a Drude-metal insulator composite are modeled by the ac resonances of a random RLC network. The real part of the effective conductance is found to show a broad surface plasmon resonance peak below and above the metal percolation threshold, and a Drude peak above the threshold. An effective-medium-approximation (EMA) calculation is in excellent agreement with the results of the simulations. We also calculate the far-infrared absorption in a model composite of normal metal and superconductor, using a lattice model. The absorption shows a strong absorption below the superconducting energy gap. An approximate calculation based on the EMA is again in excellent agreement with these results.

Original languageEnglish (US)
Pages (from-to)1063-1067
Number of pages5
JournalPhysical Review B
Volume39
Issue number2
DOIs
StatePublished - Jan 1 1989

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Light absorption
Superconducting materials
optical absorption
Metals
insulators
composite materials
Composite materials
Surface plasmon resonance
surface plasmon resonance
metals
RLC circuits
thresholds
Infrared absorption
inductors
approximation
resistors
Resistors
infrared absorption
capacitors
Energy gap

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Numerical study of optical absorption in two-dimensional metal-insulator and normal-superconductor composites. / Zeng, X. C.; Hui, P. M.; Stroud, D.

In: Physical Review B, Vol. 39, No. 2, 01.01.1989, p. 1063-1067.

Research output: Contribution to journalArticle

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