In this paper, ultra-thin narrow-band, complementary narrow-band, and dual-band metamaterial absorbers (MMAs), exploiting the same electric ring resonator configuration, are investigated at normal and oblique incidence for both transverse electric (TE) and transverse magnetic (TM) polarizations, and with different physical properties in the THz regime. In the analysis of the ultra-thin narrow-band MMA, the limit of applicability of the transmission line model has been overcome with the introduction of a capacitance which considers the z component of the electric field. These absorbing structures have shown a wide angular response and a polarization-insensitive behavior due to the introduction of a conducting ground plane and to the four-fold rotational symmetry of the resonant elements around the propagation axis. We have adopted a retrieval procedure to extract the effective electromagnetic parameters of the proposed MMAs and we have compared the simulated and analytical results through the interference theory.

Ultra-thin narrow-band, complementary narrow-band and dual-band metamaterial absorbers for applications in the THz regime / Astorino, MARIA DENISE; Frezza, Fabrizio; Tedeschi, Nicola. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - STAMPA. - 121:(2017), pp. 1-10. [10.1063/1.4975687]

Ultra-thin narrow-band, complementary narrow-band and dual-band metamaterial absorbers for applications in the THz regime

ASTORINO, MARIA DENISE;FREZZA, Fabrizio;TEDESCHI, NICOLA
2017

Abstract

In this paper, ultra-thin narrow-band, complementary narrow-band, and dual-band metamaterial absorbers (MMAs), exploiting the same electric ring resonator configuration, are investigated at normal and oblique incidence for both transverse electric (TE) and transverse magnetic (TM) polarizations, and with different physical properties in the THz regime. In the analysis of the ultra-thin narrow-band MMA, the limit of applicability of the transmission line model has been overcome with the introduction of a capacitance which considers the z component of the electric field. These absorbing structures have shown a wide angular response and a polarization-insensitive behavior due to the introduction of a conducting ground plane and to the four-fold rotational symmetry of the resonant elements around the propagation axis. We have adopted a retrieval procedure to extract the effective electromagnetic parameters of the proposed MMAs and we have compared the simulated and analytical results through the interference theory.
Electric fields; metamaterials; polarization
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Ultra-thin narrow-band, complementary narrow-band and dual-band metamaterial absorbers for applications in the THz regime / Astorino, MARIA DENISE; Frezza, Fabrizio; Tedeschi, Nicola. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - STAMPA. - 121:(2017), pp. 1-10. [10.1063/1.4975687]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/932404
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