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    • 1. 发明公开
    • Optical filter that uses localized plasmons
    • Optisches Filter mit lokalisierten Plasmonen
    • EP2128665A1
    • 2009-12-02
    • EP09007003.8
    • 2009-05-26
    • Canon Kabushiki Kaisha
    • Yamada, TomohiroKuroda, Ryo
    • G02B5/20G02B5/18
    • G02B5/204B82Y20/00G02B5/008
    • An optical filter includes a light-shielding conductive layer provided with a plurality of apertures on a substrate surface that selectively transmits light of a first wavelength, and a dielectric layer in contact with the conductive layer. A size of the apertures is a size equal to or less than the first wavelength, and a ratio of a surface area of the conductive layer to a surface area of the substrate surface is within a range of equal to or greater than 36% and equal to or less than 74%. A transmissivity of the first wavelength is increased by surface plasmons induced in the apertures by light falling on the conductive layer.
    • 光学滤波器包括在衬底表面上设置有选择性地透射第一波长的光的多个孔的光屏蔽导电层和与导电层接触的电介质层。 孔的尺寸为等于或小于第一波长的尺寸,并且导电层的表面积与基板表面的表面积的比率在等于或大于36%的范围内并且等于 至或小于74%。 第一波长的透射率由于落在导电层上的光而在孔中引起的表面等离子体激元增加。