2020
DOI: 10.3390/s20061616
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Surface Plasmon Resonance-Based Sensing Utilizing Spatial Phase Modulation in an Imaging Interferometer

Abstract: Spatial phase modulation in an imaging interferometer is utilized in surface plasmon resonance (SPR) based sensing of liquid analytes. In the interferometer, a collimated light beam from a laser diode irradiating at 637.1 nm is passing through a polarizer and is reflected from a plasmonic structure of SF10/Cr/Au attached to a prism in the Kretschmann configuration. The beam passes through a combination of a Wollaston prism, a polarizer and a lens, and forms an interference pattern on a CCD sensor of a color ca… Show more

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Cited by 9 publications
(7 citation statements)
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References 39 publications
(57 reference statements)
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“…The second method, the spatial-domain interferometric method, was described in detail in a previous paper [ 47 ] demonstrating measurement of changes in the RI of a liquid analyte. In that method we used the experimental set-up comprising a laser diode irradiating at wavelength 637.1 nm, launching optics, a gold coated SF10 glass plate (Accurion, Goettingen, Germany), a coupling prism (SF10 glass, Accurion, Goettingen, Germany), a Wollaston prism (WP05, Thorlabs, USA) and a CCD camera (PL-B952U, Pixelink, Ottawa, Canada).…”
Section: Experimental Set-upmentioning
confidence: 99%
“…The second method, the spatial-domain interferometric method, was described in detail in a previous paper [ 47 ] demonstrating measurement of changes in the RI of a liquid analyte. In that method we used the experimental set-up comprising a laser diode irradiating at wavelength 637.1 nm, launching optics, a gold coated SF10 glass plate (Accurion, Goettingen, Germany), a coupling prism (SF10 glass, Accurion, Goettingen, Germany), a Wollaston prism (WP05, Thorlabs, USA) and a CCD camera (PL-B952U, Pixelink, Ottawa, Canada).…”
Section: Experimental Set-upmentioning
confidence: 99%
“…To measure the visibility function V(∆l) for the first LED-based source, a Michelson interferometer shown in Figure 6 was used and the interferogram captured by a camera was processed for different path lengths ∆l. The processing of the interferogram includes smoothing and evaluation of the intensity, as illustrated in a previous paper [64], to obtain their extremal values and express the visibility. As an example, an interferogram composed of the spatial interference fringes with a visibility of 0.606 is shown in Figure 9a for the smallest path difference.…”
Section: Resultsmentioning
confidence: 99%
“…Using Y-Function Method (YFM) equation, Alabsi et al mathematically investigated the effect of variation of certain physical parameters on electronic features improving the CNTFET devices sensing performance [10]. The fundamental operating mechanism of SPR biosensors is to analyze variations in input incoming light and determine the changes in its characteristics at the output terminal, specifically, the fluctuation in frequency, amplitude, phase, wavelength, or polarization of light [11]. These sensors bypass the timeconsuming labeling process for molecule binding and offer real-time monitoring, label-free detection, and analysis of the analytes.…”
Section: Introductionmentioning
confidence: 99%