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    題名: Direct imaging of optimal photonic nanojets from core-shell microcylinders
    其他題名: 在核穀微米圓柱中最佳光子奈米噴流的直接成像研究
    作者: Liu, Cheng-Yang;Hsiao, Kai-Lung;劉承揚
    關鍵詞: Subwavelength structures;Superresolution;Laser beam shaping;Multilayer design
    日期: 2015-09-15
    上傳時間: 2016-01-06 11:00:36 (UTC+8)
    出版者: OPTICAL SOC AMER
    摘要: We first experimentally evaluate the direct imaging of photonic nanojets from core-shell microcylinders. The optimal photonic nanojet with long length, high intensity spot and low divergence is observed at the designed gold-silver coating microcylinder. A special microcylinder consists of a multilayered metallic shells (gold, silver and copper) and dielectric core (polydimethylsiloxane) at a diameter of 5 μm and a height of 6 μm. The electromagnetic distributions inside and outside the core-shell microcylinders are calculated by using finite-difference time-domain method. The direct imaging measurements for photonic nanojets are performed with a scanning optical microscope system. Such core-shell microcylinders provide new pathways for high resolution optical imaging which are useful for biophotonics, plasmonics and optical data storage.
    關聯: Optics Letters 40(22), pp.5303-5306
    DOI: 10.1364/OL.40.005303
    顯示於類別:[機械與機電工程學系暨研究所] 期刊論文

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