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A large-area hybrid metallic nanostructure array and its optical properties

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X Chen and K Jiang

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A process for fabricating a large-area hybrid metallic nanostructure array is presented. The structures consist of an array of metal capped dielectric nanopillars and an array of metallic holes, each possessing its individual optical properties. The plasmon response of such structures can be viewed as the collection of plasmons from two geometries to form an interacting system. Experimental results show two peak values in the extinction spectrum for p-polarized incident light. The two peaks in the extinction spectrum were shifted to longer wavelength and shorter wavelength respectively with the addition of absolute ethanol on the structure surface. The narrowest extinction peak appears at normal incidence.


PACS

78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures

73.22.Lp Collective excitations

78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

81.07.-b Nanoscale materials and structures: fabrication and characterization

81.16.Nd Nanolithography

73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 21 (28 May 2008)

Received 4 March 2008

Published 21 April 2008



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