Plasmonic enhanced fluorescence spectroscopy using side-polished microstructured optical fiber |
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| Authors: | Xia Yu Derrick Yong Huiyu Zhang Hao Li Ying Zhang Chi Chiu Chan Ho-Pui Ho Hairong Liu Deming Liu[Author vitae] |
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| Affiliation: | aSingapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore;bSchool of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore;cDepartment of Electronic and Engineering, The Chinese University of Hong Kong, Hong Kong;dCollege of Optoelectronic Science and Engineering, Huazhong University of Science & Technology, No. 1037 Luoyu Road, Wuhan, Hubei 430074, China |
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| Abstract: | We report excitation of surface plasmon in a gold-coated side-polished D-shape microstructure optical fiber (MOF). As the leaky evanescent field from the fiber core becomes highly localized by the plasmon wave, its intensity also gets amplified significantly. Here we demonstrate an efficient use of this intensified field as excitation in fluorescence spectroscopy. The so-called plasmonic enhanced fluorescence emission from Rhodamine B has been investigated experimentally. First, plasmonic effect alone was found to provide an immediate fluorescence enhancement factor of two. Second, experimental results show a good agreement with theoretical modeling. Strong evanescent field generation and surface enhancement with simple metallic coating makes this fiber based device a good candidate for compact fluorescence spectroscopy. |
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| Keywords: | Microstructured optical fibers Surface plasmon Fluorescence Spectroscopy |
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