Acta Optica Sinica, Volume. 33, Issue 5, 524002(2013)
Shape Optimization and Analysis of Sensing Properties of Localized Surface Plasmon Resonances for Triangle Metal Nanoparticles
Using three-dimensional (3D) finite-difference time-domain method, optical and sensing properties of local surface plasmon resonances of triangle metal nanoparticles with different geometric parameters are studied numerically. The influences of four parameters, including the height, the tip angle, the radius of curvature of vertex angle of the triangle and the gap, on the extinction spectra, bulk refractive index sensitivities and figures of merit of single-triangle and bi-triangle gold nanostructures are analyzed in detail. An optimization method of sensing properties is given based on the results of numerical calculation. An optimization bi-triangle nanostructure with the bulk refractive index sensitivity of 941 nm/RIU and figure of merit of 6.8 is presented.
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Luo Tingjun, Wan Lingyu, Huang Jiqin, Pang Lin, Zhang Weiping. Shape Optimization and Analysis of Sensing Properties of Localized Surface Plasmon Resonances for Triangle Metal Nanoparticles[J]. Acta Optica Sinica, 2013, 33(5): 524002
Category: Optics at Surfaces
Received: Dec. 18, 2012
Accepted: --
Published Online: May. 7, 2013
The Author Email: Lin Pang (lin.lpang@gmail.com)