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interference color of ultrathin section

interference color of ultrathin section

Interference color of an ultrathin section is produced by the interference of light reflected from the top- and bottom-faces of the ultrathin section when white light is incident onto a section in the almost vertical direction. Since the interference color corresponds to the thickness of the section, the interference color enables us to know a rough thickness of the section. Sections with thicknesses of about 70 nm, about 100 nm and about 200 nm emit interference colors of silver gold, gold and blue, respectively. 

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