期刊
JOURNAL OF OPTICS
卷 18, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/18/11/115003
关键词
surface plasmon resonance; near field intensity; absorption efficiency; finite element method
类别
资金
- University Research Grant of Universiti Brunei Darussalam [UBD-ORI-URC-RG331-U01]
- Ministry of Science and Technology of Taiwan [MOST 103-2112-M-019-MY3, MOST 104-2221-E-492-034]
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 (lambda(res)) 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.
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