Phase interrogation SPR sensing based on white light polarized interference for wide dynamic detection range

Youjun Zeng, Xueliang Wang, Jie Zhou, Ruibiao Miyan, Junle Qu, Ho-pui Ho, Kaiming Zhou, Bruce Zhi Gao, Yonghong Shao

Research output: Contribution to journalArticle

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.
Original languageEnglish
Pages (from-to)3442-3450
Number of pages9
JournalOptics Express
Volume28
Issue number3
DOIs
Publication statusPublished - 24 Jan 2020

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  • Cite this

    Zeng, Y., Wang, X., Zhou, J., Miyan, R., Qu, J., Ho, H., Zhou, K., Gao, B. Z., & Shao, Y. (2020). Phase interrogation SPR sensing based on white light polarized interference for wide dynamic detection range. Optics Express, 28(3), 3442-3450. https://doi.org/10.1364/OE.382242