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Optical characterisation of gold using surface plasmon-polaritons

R A Innes and J R Sambles

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Measurements are presented of the optical constants of a thin gold film over primarily the visible region of the spectrum using the surface plasmon-polariton resonance condition in the attenuated total-reflection configuration. Using this technique precise results are obtained and these are compared with those found using other experimental methods and also with the classical free-electron model.


PACS

78.66.Bz Metals and metallic alloys

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

78.40.Kc Metals, semimetals, and alloys

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

Dates

Issue 1 (January 1987)



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