Description:

Metallic structures with typical dimensions below the wavelength of light are expected to show dramatic local enhancement of the electromagnetic field strength. In this project, triangular metallic structures of varying shape are fabricated by using colloidal monolayers as masks. The near-field optical resonances of the resulting structures is studied experimentally and theoretically by a finite-element model calculation. Optimised coupling of incident light to a highly localised spot and defined placement of a chromophore is envisaged.

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