Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/91831
Title: Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control
Authors: Romanato, Filippo
Lee, Kwang Hong
Kang, Husen Kartasasmita
Ruffato, Gianluca
Wong, Chee Cheong
Keywords: DRNTU::Engineering::Materials::Plasma treatment
Issue Date: 2009
Source: Romanato, F., Lee, K. H., Kang, H. K., Ruffato, G. & Wong, C. C. (2009). Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control. Optics Express, 17(14), 12145-12154.
Series/Report no.: Optics express
Abstract: We present a method for improving the sensing capability of grating coupled surface plasmon resonance (GCSPR) sensors. The grating is rotated azimuthally (φ) until the excitation of double surface plasmon polaritions (SPPs) by a single wavelength is possible. Close to this condition, further tuning of the incident wavelength will merge the double SPPs into a multi-SPP resonance which is angularly broad but spectrally sharp. This is the condition where the momentum vector of the propagating SPP is perpendicular to the incident light momentum. We demonstrate this sensitivity enhancement on a Au grating surface using a dodecanethiol (C12) self-assembled monolayer (SAM). Using this method, a shift in resonance angle as large as 3° can be observed. The simulated sensitivity of this method shows that a sensitivity up to 800°/RIU is achievable, which is one order of magnitude greater than that in a conventional fixed grating (φ = 0°) as well as the prism-coupled Kretschmann configuration.
URI: https://hdl.handle.net/10356/91831
http://hdl.handle.net/10220/6202
ISSN: 1094-4087
DOI: 10.1364/OE.17.012145
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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