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Proceedings Paper

Sensitivity of long period fiber gratings to nanoscale ionic self-assembled multilayers
Author(s): Zhiyong Wang; J. R. Heflin; Kevin Vancott; Rogers H. Stolen; Siddharth Ramachandran; Samir Ghalmi
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Paper Abstract

We have shown that ionic self-assembled multilayers (ISAMs) deposited on optical fiber long period gratings (LPGs) yield dramatic resonant-wavelength shifts, even with nanometer-thick films. Precise control of the refractive index and the thickness of these films was achieved by altering the relative fraction of the anionic and cationic materials combined with layer-by-layer deposition. We demonstrate the feasibility of this highly controllable deposition-technique for fine-tuning grating properties for grating applications. In addition, we confirm theoretically that the resonant wavelength shift can result from either the variation of the thickness of the film and/or the variation of its refractive index. Finally, we demonstrate that ISAMs adsorbed on LPGs function effectively as biosensors. These simulations and experimental results confirm that ISAM-coated-LPGs provide a thermally-stable, reusable, robust, and attractive platform for building efficient fiber optic sensors and devices.

Paper Details

Date Published: 12 September 2005
PDF: 10 pages
Proc. SPIE 5925, Nanophotonic Materials and Systems II, 59250U (12 September 2005);
Show Author Affiliations
Zhiyong Wang, Virginia Tech (United States)
J. R. Heflin, Virginia Tech (United States)
Kevin Vancott, Virginia Tech (United States)
Rogers H. Stolen, Virginia Tech (United States)
Siddharth Ramachandran, OFS Labs. (United States)
Samir Ghalmi, OFS Labs. (United States)

Published in SPIE Proceedings Vol. 5925:
Nanophotonic Materials and Systems II
Zeno Gaburro; Stefano Cabrini, Editor(s)

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