Plasmonic spectrum on 1D and 2D periodic arrays of rod-shape metal nanoparticle pairs with different core patterns for biosensor and solar cell applications

• Published in: Journal of optics (2010) 2016-11, Vol.18 (11), p.115003
• Main Authors: Kumara, N T R N, Chau, Yuan-Fong Chou, Huang, Jin-Wei, Huang, Hung Ji, Lin, Chun-Ting, Chiang, Hai-Pang
• Format: Article
• Language: English
• Subjects: absorption efficiency; finite element method; near field intensity; surface plasmon resonance
• ISSN: 2040-8978; 2040-8986
• DOI: 10.1088/2040-8978/18/11/115003

Simulations of surface plasmon resonance (SPR) on the near field intensity and absorption spectra of one-dimensional (1D) and two-dimensional (2D) periodic arrays of rod-shape metal nanoparticle (MNP) pairs using the finite element method (FEM) and taking into account the different core patterns for biosensor and solar cell applications are investigated. A tunable optical spectrum corresponding to the transverse SPR modes is observed. The peak resonance wavelength (λres) can be shifted to red as the core patterns in rod-shape MNPs have been changed. We find that the 2D periodic array of core-shell MNP pairs (case 2) exhibit a red shifted SPR that can be tuned the gap enhancement and absorption efficiency simultaneously over an extended wavelength range. The tunable optical performances give us a qualitative idea of the geometrical properties of the periodic array of rod-shape MNP pairs on SPRs that can be as a promising candidate for plasmonic biosensor and solar cell applications.