In the detector based on surfaceplasmonwave resonance, the metal film contacts the detected material directly. A dielectric layer is coated on the metal film to protect it.
A plasmon is an electronic surfacewave that rolls through the sea of conduction electrons on a metal.
一个是电子表面等离子体波，在金属辊通过海传导电子。
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Surfaceplasmon polaritons are a state of evanescent wave, which are localized on the surface of a metal by the interaction of free-electrons and photons.