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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/97934


    Title: Real-space observation of photonic nanojet in dielectric microspheres
    Other Titles: 在微米圓球中光子奈米噴流的直接觀察研究
    Authors: Liu, Cheng-Yang;Wang, Yung-Hsun
    Contributors: 淡江大學機械與機電工程學系
    Keywords: Photonic nanojet;Microsphere;Microscopy
    Date: 2014-07
    Issue Date: 2014-05-05 11:12:19 (UTC+8)
    Publisher: Amsterdam: Elsevier BV * North-Holland
    Abstract: The three-dimensional real-space observation of photonic nanojet in different microspheres illuminated by a laser is reported. The finite-difference time-domain technique is used to perform the three-dimensional numerical simulation for the dielectric microspheres. The key parameters of photonic nanojet are measured by using a scanning optical microscope system. We reconstruct the three-dimensional real-space photonic nanojets from the collected stack of scanning images for polystyrene microspheres of 3 μm, 5 μm, and 8 μm diameters deposited on a glass substrate. Experimental results are compared to calculations and are found in good agreement with simulation results. The full width at half-maximum of the nanojet is 331 nm for a 3 μm microsphere at an incident wavelength of 633 nm. Our investigations show that photonic nanojets can be efficiently imaged by a microsphere and straightforwardly extended to rapidly distinguish the nano-objects in the far-field optical system.
    Relation: Physica E: Low-dimensional Systems and Nanostructures 61, pp.141–147
    DOI: 10.1016/j.physe.2014.03.019
    Appears in Collections:[機械與機電工程學系暨研究所] 期刊論文

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