Highly sensitive refractive index sensor based on Bloch surface waves with lithium niobate film

Highly sensitive refractive index sensor based on Bloch surface waves with lithium niobate film

This paper demonstrates a novel Bloch surface wave (BSW) sensor with high sensitivity. A lithium niobate (LiNbO 3 ) film is introduced on the top layer of SiO 2 /TiO 2 one-dimensional photonic crystal. BSW resonance is excited by the Kretschmann prism. The rigorous coupled wave analysis method (RCWA...

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Veröffentlicht in:Applied physics. A, Materials science & processing Materials science & processing, 2022, Vol.128 (1), Article 53
Hauptverfasser: Ge, Daohan, Zhou, Yujie, Shi, Jiakang, Zhang, Liqiang, Zhu, Shining
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Characterization and Evaluation of Materials
Chemical sensors
Condensed Matter Physics
Lithium niobates
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Photonic crystals
Physics
Physics and Astronomy
Processes
Refractivity
Sensors
Silicon dioxide
Surface waves
Surfaces and Interfaces
Thin Films
Titanium dioxide
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Zusammenfassung:This paper demonstrates a novel Bloch surface wave (BSW) sensor with high sensitivity. A lithium niobate (LiNbO 3 ) film is introduced on the top layer of SiO 2 /TiO 2 one-dimensional photonic crystal. BSW resonance is excited by the Kretschmann prism. The rigorous coupled wave analysis method (RCWA) is used to conduct numerical simulation analysis of the designed BSW sensor. The wavelength and azimuth sensitivity of the designed sensor can reach 1522 nm/RIU and 646°/RIU, respectively, or even higher. The results reveal the potential application of LiNbO 3 as a tunable material in the field of refractive index sensors for chemical and biological sensing.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-021-05212-2