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Abstract.Multiple surface plasmon resonances are experimentally observed for p-polarized as well as s-polarized incident light at the planar interface of a metal and a chiral sculptured thin film. These experimental results confirm that four surface plasmon resonances can be supported at the interface of metal-chiral sculptured thin film. Multiple surface plasmon resonances may allow for multiple simultaneous measurements by devices that utilize surface plasmon resonance for detection. C 2010 Society of Photo-Optical Instrumentation Engineers.

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Structural colors are non-pigment colors that originate from the scattering of light from ordered microstructures, thin films, and even irregular arrays of scatterers. Examples include the flashing sparks of colors in opals and the brilliant hues of some butterflies such as Morpho rhetenor. Structural colors arise in nature from one or more of a palette of physical mechanisms that are now understood quite well and can be implemented industrially to produce structurally colored paints, fabrics, and cosmetics.