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Comparative assessment of the sensitivity of localized surface plasmon resonance transducers and interference‐based Fabry‐Pérot transducers
Author(s) -
Kedem O.,
Vaskevich A.,
Rubinstein I.
Publication year - 2012
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201200165
Subject(s) - transducer , sensitivity (control systems) , surface plasmon resonance , fabry–pérot interferometer , interference (communication) , materials science , astronomical interferometer , interferometry , reflection (computer programming) , optics , optoelectronics , resonance (particle physics) , acoustics , nanotechnology , nanoparticle , computer science , electronic engineering , physics , wavelength , telecommunications , channel (broadcasting) , particle physics , engineering , programming language
Localized surface plasmon resonance (LSPR) transducers have been widely investigated for use in sensing applications. An alternative approach based on interference from thin films (Fabry‐Pérot interferometers) has been previously advanced, offering a rather high sensitivity. Both methods involve easily produced substrates and simple optical setups. Here, the sensitivity offered by typical transducers of the two kinds in a usual sensing scenario is compared quantitatively, using experimental and simulated data, and their respective advantages are discussed. To facilitate the comparison a simple sensitivity parameter is proposed. It is concluded that LSPR transducers offer superior sensitivity for analytes and recognition interfaces of small dimensions (up to several nanometers), especially in a wet environment, while the interference transducers become advantageous for thicker layers in dry conditions. For LSPR transducers, significantly higher sensitivity is obtained by using reflection, rather than transmission, measurements.