Localized surface plasmons, surface plasmon polaritons, and their coupling in 2D metallic array for SERS
作者： Luping Du , Xuejin Zhang , Ting Mei , Xiaocong Yuan , None
DOI: 10.1364/OE.18.001959
关键词:
摘要: A substrate with ease for fabrication is proposed surface enhanced Raman spectroscopy (SERS). two-dimensional dielectric grating covered by a thin silver film enables the excitation of both localized plasmons (LSPs) and plasmon polaritons (SPPs). The finite-difference time-domain simulation results show that coupling between LSPs SPPs able to highly improve enhancement (2 x 10(9) as obtained simulation). In addition, near-field distribution at top cubic bumps along transverse plane presents regular hotspots pattern, which required an ideal SERS substrate.
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