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Broadband telecom transparency of semiconductor-coated metal nanowires: More transparent than glass

AuthorsPaniagua-Domínguez, R. ; Abujetas, Diego R. ; Froufe-Pérez, Luis S. ; Sáenz, J. J.; Sánchez-Gil, José A.
Issue Date2013
PublisherOptical Society of America
CitationOptics Express 21: 22076- 22089 (2013)
AbstractMetallic nanowires (NW) coated with a high permittivity dielectric are proposed as means to strongly reduce the light scattering of the conducting NW, rendering them transparent at infrared wavelengths of interest in telecommunications. Based on a simple, universal law derived from electrostatics arguments, we find appropriate parameters to reduce the scattering efficiency of hybrid metal-dielectric NW by up to three orders of magnitude as compared with the scattering efficiency of the homogeneous metallic NW. We show that metal@dielectric structures are much more robust against fabrication imperfections than analogous dielectric@metal ones. The bandwidth of the transparent region entirely covers the near IR telecommunications range. Although this effect is optimum at normal incidence and for a given polarization, rigorous theoretical and numerical calculations reveal that transparency is robust against changes in polarization and angle of incidence, and also holds for relatively dense periodic or random arrangements. A wealth of applications based on metal-NWs may benefit from such invisibility. © 2013 Optical Society of America.
Identifiersdoi: 10.1364/OE.21.022076
issn: 1094-4087
Appears in Collections:(CFMAC-IEM) Artículos
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