High performing phase-based surface plasmon resonance sensing from metallic nanohole arrays

Journal Article · Mon Apr 28 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4875019· OSTI ID:22267702

Cao, Z. L.; Wong, S. L.; Wu, S. Y.; Ho, H. P. ^[1]

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1. Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong (China)

We show the spectral figure-of-merit (FOM) from nanohole arrays can be larger than 1900/RIU by phase-based surface plasmon resonance. By using temporal coupled mode theory, we find the p-s polarization phase jump is the sharpest when both the absorption and radiative decay rates of surface plasmon polaritons are matched, yielding an extremely small spectral differential phase linewidth and thus superior FOM. The result is supported by numerical simulation and experiment. As a demonstration, we show the phase detection outperforms the conventional spectral counterpart significantly by sensing the binding of bovine serum albumin antibodies under identical condition.

• OSTI ID: 22267702
• Journal Information: Applied Physics Letters, Vol. 104, Issue 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
PLASMONS
POLARONS
RADIATIVE DECAY
RESONANCE