Investigation on localized surface plasmon resonance of different nano-particles for bio-sensor applications

D. Mortazavi*, A. Z. Kouzani, L. Matekovits

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

4 Citations (Scopus)

Abstract

This paper proposes a novel sinusoidal shape nano-particle employed in localized surface plasmon resonance (LSPR) devices. Numerical modeling demonstrates advantages offered by the proposed nano-sinusoid on LSPR enhancement against 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.

Original languageEnglish
Title of host publicationICEAA'12
Subtitle of host publicationProceedings of the 2012 International Conference on Electromagnetics in Advanced Applications
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages865-868
Number of pages4
ISBN (Electronic)9781467303354, 9781467303347
ISBN (Print)9781467303330
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 14th International Conference on Electromagnetics in Advanced Applications, ICEAA 2012 - Cape Town, South Africa
Duration: 2 Sep 20127 Sep 2012

Other

Other2012 14th International Conference on Electromagnetics in Advanced Applications, ICEAA 2012
CountrySouth Africa
CityCape Town
Period2/09/127/09/12

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