Description of a problem At terahertz frequencies, the wave penetrates the metals due to the plasmonic effect and they show high degree of permittivity frequency dependency, i.e. highly dispersive. Consequently, the selection of the metal type used for realizing Nano-antennas is much more critical than the case of microwave antennas. Proposed approach In this paper the relative permittivity response of noble metals and one different class of materials proposed as alternative to noble metals are investigated and compared at MID-IR electromagnetic region. The frequency dependent complex permittivity and the electrical conductivity of metal in the terahertz frequency range is described using the Drude intraband transitions. Comparison between simulated dispersion curves allows us to investigate the origin of the dissipative behavior of the materials, which are an unavoidable prerequisite for any realistic application. Relationships among permittivity, electric conductivity, refractive index and skin depth are examined.

Investigation on Low Loss Plasmonic metal: Looking beyond Lossy Conventional Noble Metals at MID-IR Frequency / Citroni, Rocco; Di Paolo, Franco; Di Carlo, Aldo. - (2017), pp. 1-1. (Intervento presentato al convegno NANOINNOVATION 2017 tenutosi a Rome) [10.13140/rg.2.2.32139.30249].

Investigation on Low Loss Plasmonic metal: Looking beyond Lossy Conventional Noble Metals at MID-IR Frequency

Rocco Citroni
Primo
Writing – Original Draft Preparation
;
2017

Abstract

Description of a problem At terahertz frequencies, the wave penetrates the metals due to the plasmonic effect and they show high degree of permittivity frequency dependency, i.e. highly dispersive. Consequently, the selection of the metal type used for realizing Nano-antennas is much more critical than the case of microwave antennas. Proposed approach In this paper the relative permittivity response of noble metals and one different class of materials proposed as alternative to noble metals are investigated and compared at MID-IR electromagnetic region. The frequency dependent complex permittivity and the electrical conductivity of metal in the terahertz frequency range is described using the Drude intraband transitions. Comparison between simulated dispersion curves allows us to investigate the origin of the dissipative behavior of the materials, which are an unavoidable prerequisite for any realistic application. Relationships among permittivity, electric conductivity, refractive index and skin depth are examined.
2017
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1713203
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