Investigation of metallic nanowire-based localized surface plasmon resonance optical biosensors using extinction spectra

Kyung Min Byun; Sung June Kim; Donghyun Kim

doi:10.1117/12.644105

23 February 2006 Investigation of metallic nanowire-based localized surface plasmon resonance optical biosensors using extinction spectra

Kyung Min Byun, Sung June Kim, Donghyun Kim

Author Affiliations +

Proceedings Volume 6099, Plasmonics in Biology and Medicine III; 60990U (2006) https://doi.org/10.1117/12.644105
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

In this study, we investigate the impact of the cross sectional profile of an array of metallic nanowires on the feasibility of a localized surface plasmons resonance (LSPR) biosensor. Calculations were performed using rigorous coupled wave analysis with an emphasis on the extinction properties of the LSPR structure. It was confirmed that the resonance spectrum strongly depends on the nanowire period and profile. Our numerical results indicate that the nanowire structure, particularly that of a T-profile, delivers extremely linear sensing performance over a wide range of target refractive index with much enhanced sensitivity. The extinction-based LSPR structure also involves relatively large dimension and thus is expected to provide a feasible biosensor using current semiconductor technology.

Citation Download Citation

Kyung Min Byun, Sung June Kim, and Donghyun Kim "Investigation of metallic nanowire-based localized surface plasmon resonance optical biosensors using extinction spectra", Proc. SPIE 6099, Plasmonics in Biology and Medicine III, 60990U (23 February 2006); https://doi.org/10.1117/12.644105

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