Author

Li-Jun Guo

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Open access Oct 2026

High-performance D-shaped optical fiber refractive index sensor based on coupling between a silicon subwavelength grating and surface plasmons

To simultaneously achieve high spectral resolution and efficient fixed-wavelength intensity interrogation in D-shaped fiber refractive-index sensing, a waveguide-coupled D-shaped optical fiber sensor integrating an indium tin oxide (ITO) film, a Cytop coupling layer, and a silicon subwavelength grating (Si-SWG) is pr...

Zhuo-Zhe Li, Jun-Ding Sha, Li-Jun Guo · Physica Scripta · 0 citations

Open access Sep 2026

Structural parameter optimization and mode-dependent sensing performance analysis of a D-shaped multimode fiber SPR sensor

The core refractive index of conventional pure SiO2 optical fiber (approximately 1.45) is lower than that of typical industrial lubricating oils (n ≈ 1.47), rendering it incapable of satisfying the phase-matching condition for surface plasmon resonance (SPR) excitation. To address this limitation, this paper proposes a...

Jun-Ding Sha, Zhuo-Zhe Li, Li-Jun Guo · Physica Scripta · 0 citations