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UV surface plasmon resonance modification by graphene Pi plasmon resonance (Conference Presentation)

Paper Abstract

Despite of increasing understandings of UV plasmonic materials, materials that can enable active tuning of UV plasmonic resonance has not been reported. Here, we demonstrate a modification of UV SPR on an aluminum (Al) hole-array by coupling Graphene π plasmon resonance with Al SPR. Graphene monolayer exhibits an abnormal absorption peak in the UV region (270-290nm) due to π plasmon resonance. The location and intensity of the absorption peak depend on the position of Fermi-level, which can be adjusted by electric or chemical doping. Al SPR is shown here to be modified by coupling Graphene π plasmon resonance with Al SPR. FDTD simulation shows the modification of Al hole-array transmission by adding a single layer of Graphene on top. The shifts of transmission dips after adding a Graphene layer shows a distinct transition at around the Graphene π plasmon position. For transmission dips that are located at shorter wavelength compared to Graphene π plasmon, up to 8nm blue shifts occur after adding Graphene. On the other hand, up to 20nm redshifts occur for transmission dips that are at a longer wavelength relative to Graphene π plasmon. This change in the sign of shifts of transmission dips corresponds to the change in the sign of the real permittivity of Graphene. The amount of shifts diminishes as the transmission dip moves further away from Graphene π plasmon resonance into the visible spectrum. Experimentally we have observed redshifts of SPR dips but not blue shifts possibly due to the poor light collection below 250nm.

Paper Details

Date Published: 9 September 2019
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Proc. SPIE 11086, UV and Higher Energy Photonics: From Materials to Applications 2019, 1108608 (9 September 2019); doi: 10.1117/12.2529825
Show Author Affiliations
Xueling Cheng, The Univ. of Utah (United States)
Sourangsu Banerji, The Univ. of Utah (United States)
Jieying Mao, The Univ. of Utah (United States)
Sara Arezoomandan, The Univ. of Utah (United States)
Ting Zhang, The Univ. of Utah (United States)
Steve Blair, The Univ. of Utah (United States)
Berardi Sensale-Rodriguez, The Univ. of Utah (United States)
Yunshan Wang, The Univ. of Utah (United States)


Published in SPIE Proceedings Vol. 11086:
UV and Higher Energy Photonics: From Materials to Applications 2019
Gilles Lérondel; Yong-Hoon Cho; Atsushi Taguchi; Satoshi Kawata, Editor(s)

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