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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Chiang, Chih-KaiSubject: search.filters.subject.silver

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    Realization of UV Plasmonic Nanolasers With Extremely Small Mode Volume
    (2015-11-01)
    Chou, Bo-Tsun
    ;
    Chou, Yu-Hsun
    ;
    Chiang, Chih-Kai
    ;
    Wu, Yen-Mo
    ;
    Lin, Tzy-Rong
    It is difficult to operate plasmonic nanolasers on silver films in the ultraviolet regime owing to the bending-back effect of surface plasmon dispersion. In this paper, we report on plasmonic lasers comprised of a ZnO nanowire lying on a single-crystalline silver film with a SiO2 spacer layer. The silver can strongly shrink the mode volume, thereby boosting the Purcell factor. Meanwhile, the SiO2 spacer thickness is optimized to adjust the surface plasmon dispersion curve so that the lasing wavelength can be located at a large dispersion region, thereby achieving a large group index of 55, an ultra-small effective mode volume of 3.5 x 10(-3)lambda(3), and low-threshold of 11 MW/cm(2).
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    Ultrastrong Mode Confinement in ZnO Surface Plasmon Nanolasers
    (2015-04-01)
    Chou, Yu-Hsun
    ;
    Chou, Bo-Tsun
    ;
    Chiang, Chih-Kai
    ;
    Lai, Ying-Yu
    ;
    Yang, Chun-Ting
    Nano lasers with an ultracompact footprint can provide high-intensity coherent light, which can be potentially applied to high-capacity signal processing, biosensing, and subwavelength imaging. Among various nanolasers, those with cavities surrounded by metals have been shown to have superior light emission properties because of the surface plasmon effect that provides enhanced field confinement capability and enables exotic light matter interaction. In this study, we demonstrated a robust ultraviolet ZnO nanolaser that can operate at room temperature by using silver to dramatically shrink the mode volume. The nanolaser shows several distinct features including an extremely small mode volume, a large Purcell factor, and a slow group velocity, which ensures strong interaction with the exciton in the nanowire.