Monitoring layer-by-layer assembly of polyelectrolyte multi-layers using high-order cladding mode in long-period fiber gratings

We have undertaken a combined theoretical and experimental investigation to illustrate and demonstrate the strong correlation between the order of the coupled cladding modes in long-period gratings (LPG) in conventional single mode fiber and their sensitivity to the process of layer-by-layer (LbL) a...

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Published inSensors and actuators. B, Chemical Vol. 196; pp. 475 - 479
Main Authors Tian, Fei, Kaňka, Jiří, Li, Xiangzhi, Du, Henry
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2014
Subjects
Assembly
Cladding
Cladding mode
Fibers
Layer-by-layer assembly
Long-period grating
LPG
Multilayers
Polyelectrolyte
Polyelectrolytes
Robustness
Sensors
Polyelectrolyte
Cladding mode
Layer-by-layer assembly
Long-period grating
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Summary:We have undertaken a combined theoretical and experimental investigation to illustrate and demonstrate the strong correlation between the order of the coupled cladding modes in long-period gratings (LPG) in conventional single mode fiber and their sensitivity to the process of layer-by-layer (LbL) assembly of polyelectrolyte multi-layers. We show that high-order cladding modes such as LP0,10 in LPG are significantly more sensitive than their lower-order counterparts such as LP0,2, with LP0,10 yielding a shift of 1.575nm in resonance wavelength per polyelectrolyte repeating unit of poly(vinyl pyrrolidone)/poly(methacrylic acid) bi-layer. The integrated LPG/LbL strategy as a robust LbL test-bed has broad ramifications in exploring and exploiting sensors and devices enabled by versatile, stimuli-responsive polyelectrolyte thin films.
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ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2014.02.013