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Progress In Electromagnetics Research
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EVOLUTION TOWARDS A NEW LSPR PARTICLE: NANO-SINUSOID

By D. Mortazavi, A. Z. Kouzani, and L. Matekovits

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Abstract:
This paper proposes a novel nano-sinusoid particle to be employed in enhanced localized surface plasmon resonance (LSPR) bio-sensing devices. Numerical investigations are carried out to demonstrate advantages offered by the proposed nano-particle on LSPR enhancement over other nano-particles including noble nano-triangles and nano-diamonds. Although nano-triangles exhibit high concentration of the electric field near their tips, when illuminated with a light polarized along the tip axis, they present only one hot spot at the vertex along the polarization direction. To create a structure with two hot spots, which is desired in bio-sensing applications, two nano-triangles can be put back-to-back. Therefore, a nano-diamond particle is obtained which exhibits two hot spots and presents higher enhancements than nano-triangles for the same resonant wavelength. The main drawback of the nano-diamonds is the fluctuation in their physical size-plasmon spectrum relationships, due to a high level of singularity as the result for their four sharp tip points. The proposed nano-sinusoid overcomes this disadvantage while maintaining the benefits of having two hot spots and high enhancements.

Citation:
D. Mortazavi, A. Z. Kouzani, and L. Matekovits, "Evolution towards a new lspr particle: nano-sinusoid," Progress In Electromagnetics Research, Vol. 132, 199-213, 2012.
doi:10.2528/PIER12081101
http://www.jpier.org/pier/pier.php?paper=12081101

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