5 March 2014 Bowtie plasmonic nanoantenna arrays for polarimetric optical biosensing
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Abstract
We report on the first polarimetric plasmonic biosensor based on arrays of bowtie nanoantennas. Using the Finite Element Method (FEM) the phase retardation between the components of light polarized parallel and perpendicular to the axis of the nanoantennas is studied. After optimizing them for high volumetric sensitivity at a wavelength of 780 nm, sensitivities ~5 rad/RIU are obtained, corresponding to a detection limit ~10-7 RIU when using the polarimetric readout platform. Surface sensitivity values resulted from studies of phase retardation changes from a coverage of bioreceptors and analytes.
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Jonathan Calderón, Jesús Álvarez, Juan Martinez-Pastor, Daniel Hill, "Bowtie plasmonic nanoantenna arrays for polarimetric optical biosensing", Proc. SPIE 8933, Frontiers in Biological Detection: From Nanosensors to Systems VI, 89330I (5 March 2014); doi: 10.1117/12.2039644; https://doi.org/10.1117/12.2039644
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