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MEASUREMENT OF RADIATION TRANSFER THROUGH NANO-APERTURES USING NEAR-FIELD SCANNING OPTICAL MICROSCOPY

机译:近场扫描光学显微镜通过纳米孔的辐射传递测量

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摘要

Ridge apertures in various shapes have attracted extensive studies which showed their potential capabilities in realizing both enhanced transmission and nanoscale optical resolution, therefore, enabling ultrahigh density near-field optical recording. In this work, the optical near field distributions of an H-shaped ridge aperture and comparable regular apertures made in aluminum film are experimentally investigated using a home-made near-field scanning optical microscope. With a sub-100 nm aperture probe, the full-width half-magnitude (FWHM) near-field spot of the H aperture is measured as 106 nm by 80 nm, comparable to the gap size but substantially smaller than that obtained from a square aperture with the same area. The elongated near-field light spot in the direction across the ridges is due to the scattering of the transmitted light on the edges based on results of numerical calculations.
机译:各种形状的脊孔已经吸引了广泛的研究,显示了它们在实现增强的透射率和纳米级光学分辨率方面的潜在能力,因此可以实现超高密度的近场光学记录。在这项工作中,使用自制的近场扫描光学显微镜通过实验研究了H形脊孔和铝膜制得的类似规则孔的光学近场分布。使用低于100 nm的孔径探头,测得的H孔径的全宽半幅(FWHM)近场光斑为106 nm x 80 nm,与间隙尺寸相当,但实际上小于从正方形获得的间隙尺寸相同面积的光圈。在跨脊的方向上延长的近场光点是由于基于数值计算结果的透射光在边缘上的散射所致。

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