22 February 2017 The trapezoidal nanostructure based surface plasmon resonance
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Abstract
The surface plasmon erupted by bare metallic film has limitation of localizing high intensity field. Thus, nanostructures on the metallic film (such as nanowire, nanopost) have been used to enhance the Plasmon field by antenna effect. In the case of nanowire, field is highly localized at the sharpened edge of the nanowire. If there is an additional enhancing factor such as a gap between the edges of the nanostructures, area of highly localized field is formed. By adopting reversed trapezoidal structure, we expected to control area and intensity of highly localized plasmon field from both the nano-antenna effect and the gap plasmonic effect. So, we simulated trapezoidal nanowire structure changing the ratio of bottom length and top length of nanostructure. Then we can observe the variation of Plasmon field and intensity. In addition, we can obtain unusual result that the intensity of Plasmon field is highly reduced at specific ratio of bottom length and top length.
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Tae Young Kang, Tae Young Kang, Don-Myeong Shin, Don-Myeong Shin, Hyerin Song, Hyerin Song, Kyujung Kim, Kyujung Kim, } "The trapezoidal nanostructure based surface plasmon resonance", Proc. SPIE 10077, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIV, 1007707 (22 February 2017); doi: 10.1117/12.2253523; https://doi.org/10.1117/12.2253523
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