Abstract

The concept of Superprism which is used in photonic crystal will be introduced into optical film coatings, due to the fact that the group velocity of the light is different as the wavelength in certain special case for the multiplayer film coatings. In this paper, The superprism effect of multilayer film coatings will be presented both from theoretical analysis and experimental results, these researches will create an new application of the film coatings not only to be a spectral filter but also can acts as thin film gratings.

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