Control of plasmon dephasing time using stacked nanogap gold structures for strong near-field enhancement

Kosei Ueno,Jinghuan Yang,Quan Sun, Daisuke Aoyo,Han Yu,Tomoya Oshikiri,Atsushi Kubo,Yasutaka Matsuo,Qihuang Gong,Hiroaki Misawa

Applied Materials Today（2019）

Cited 32|Views8

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Abstract

•Near-field spectral properties of the stacked gold nanostructures are studied.•A method for controlling plasmon dephasing time by plasmonic coupling is proposed.•The dark plasmon mode shows a longer dephasing time compared with the bright mode.•The elongation of the dephasing time leads to the strong near-field enhancement.

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Key words

Surface plasmon resonance,Plasmon dephasing,Near-field enhancement,Dark plasmon mode,Photoemission electron microscopy (PEEM)

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