Abstract
A phase surface plasmon resonance (SPR) sensing technology based on white
light polarized interference in common-path geometry is reported. A halogen lamp is used
as the excitation source of the SPR sensor. The fixed optical path difference (OPD) between
p- and s-polarized light is introduced by a birefringence crystal to produce sinusoidal spectral
interference fringes. The SPR phase is accurately extracted from the interference fringes using a
novel iterative parameter-scanning cross-correlation algorithm. The dynamic detection range
is expanded by tracking the best SPR wavelength, which is identified using a window Fourier
algorithm. The experimental results show that the sensitivity of this SPR system was 1.3 × 10−7
RIU, and the dynamic detection range was 0.029 RIU. This sensor, not only simple to implement
and cost efficient, requires no modulators.
light polarized interference in common-path geometry is reported. A halogen lamp is used
as the excitation source of the SPR sensor. The fixed optical path difference (OPD) between
p- and s-polarized light is introduced by a birefringence crystal to produce sinusoidal spectral
interference fringes. The SPR phase is accurately extracted from the interference fringes using a
novel iterative parameter-scanning cross-correlation algorithm. The dynamic detection range
is expanded by tracking the best SPR wavelength, which is identified using a window Fourier
algorithm. The experimental results show that the sensitivity of this SPR system was 1.3 × 10−7
RIU, and the dynamic detection range was 0.029 RIU. This sensor, not only simple to implement
and cost efficient, requires no modulators.
Original language | English |
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Pages (from-to) | 3442-3450 |
Number of pages | 9 |
Journal | Optics Express |
Volume | 28 |
Issue number | 3 |
DOIs | |
Publication status | Published - 24 Jan 2020 |
Bibliographical note
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