Perfect magnetic mirror and simple perfect absorber in the visible spectrum

C. A. Valagiannopoulos, A. Tukiainen, T. Aho, T. Niemi, M. Guina, S. A. Tretyakov, C. R. Simovski

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Known experimental artificial magnetic conductors for terahertz and optical frequencies are formed by arrays of nanoparticles of various shapes. In this paper, we show that artificial magnetic conductors for the visible spectrum can be realized as simple, effectively quasistatic resonating structures, where the effective inductance is due to the magnetic flux inside a uniform metal substrate, and the effective capacitance is due to electric polarization of a thin uniform dielectric cover. To illustrate the main potential application of artificial magnetic conductors, we concentrate on the perfect-absorption regime, achieved by adjusting the loss factor of the artificial magnetic conductor to match its real input impedance to free space. We provide approximate analytical design formulas and introduce a simple equivalent circuit to explain the physical mechanism of emulation of magnetic response and perfect absorption of light. A prototype of a nearly perfect absorber for optical (from green to ultraviolet) frequencies is designed and experimentally tested. The results confirm the theoretical predictions and show polarization insensitivity and angular independence of response in a wide range of incidence angles.

Original languageEnglish
Article number115305
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number11
DOIs
Publication statusPublished - Mar 11 2015
Externally publishedYes

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Magnetic mirrors
magnetic mirrors
visible spectrum
absorbers
conductors
Polarization
Magnetic flux
Equivalent circuits
Inductance
Capacitance
Metals
Nanoparticles
Substrates
polarization
equivalent circuits
inductance
magnetic flux
incidence
capacitance
adjusting

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Perfect magnetic mirror and simple perfect absorber in the visible spectrum. / Valagiannopoulos, C. A.; Tukiainen, A.; Aho, T.; Niemi, T.; Guina, M.; Tretyakov, S. A.; Simovski, C. R.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 11, 115305, 11.03.2015.

Research output: Contribution to journalArticle

Valagiannopoulos, C. A. ; Tukiainen, A. ; Aho, T. ; Niemi, T. ; Guina, M. ; Tretyakov, S. A. ; Simovski, C. R. / Perfect magnetic mirror and simple perfect absorber in the visible spectrum. In: Physical Review B - Condensed Matter and Materials Physics. 2015 ; Vol. 91, No. 11.
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