Sensitivity of long period fiber gratings to nanoscale ionic self-assembled multilayers

Zhiyong Wang; J. R. Heflin; Kevin Vancott; Rogers H. Stolen; Siddharth Ramachandran; Samir Ghalmi

doi:10.1117/12.616002

12 September 2005 Sensitivity of long period fiber gratings to nanoscale ionic self-assembled multilayers

Zhiyong Wang, J. R. Heflin, Kevin Vancott, Rogers H. Stolen, Siddharth Ramachandran, Samir Ghalmi

Proceedings Volume 5925, Nanophotonic Materials and Systems II; 59250U (2005) https://doi.org/10.1117/12.616002
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Zhiyong Wang, J. R. Heflin, Kevin Vancott, Rogers H. Stolen, Siddharth Ramachandran, and Samir Ghalmi "Sensitivity of long period fiber gratings to nanoscale ionic self-assembled multilayers", Proc. SPIE 5925, Nanophotonic Materials and Systems II, 59250U (12 September 2005); https://doi.org/10.1117/12.616002

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