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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/107068


    Title: Geometric effect on photonic nanojet generated by dielectric microcylinders with non-cylindrical cross-sections
    Other Titles: 使用非圓柱狀介電微米柱研究幾何變化對於光子奈米噴流生成的影響
    Authors: Cheng-Yang Liu;Fan-Chih Lin;劉承揚
    Keywords: Photonic nanojet;microcylinder;subwavelength
    Date: 2016-12
    Issue Date: 2016-08-15
    Publisher: Elsevier BV * North-Holland
    Abstract: We experimentally report the geometric effect on photonic nanojet generated by dielectric microcylinders with non-cylindrical cross-sections. The non-cylindrical cross-sections include truncated microcylinders and elliptical microcylinders. The truncated microcylinder is formed with the cutting thickness. The elliptical microcylinder is defined by ratio of minor to major axes. The specific spatial electromagnetic fields for microcylinders with different non-cylindrical cross-sections are studied by using finite-difference time-domain calculation. The direct imaging of photonic nanojets for microcylinders with different non-cylindrical cross-sections are performed with a scanning optical microscope system. The field distribution and location of photonic nanojet depending on the various spatial shapes are experimentally demonstrated. The photonic nanojet with long focal length and low divergence could be used to scan over a target to obtain a large area image when the non-cylindrical micro-media are coupled with a conventional optical microscope.
    Relation: Optics Communications 380, p.287-296
    DOI: 10.1016/j.optcom.2016.06.021
    Appears in Collections:[機械與機電工程學系暨研究所] 期刊論文

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