STUDY OF PLASMON RESONANCE IN COPPER FILMDEPOSITED ON OPTICAL FIBER
WITH TILTED FIBER BRAGG GRATING
Nechepurenko 1,2, A. V. Dorofeenko 1,2,3, K. A.
Tomyshev 4, O. V. Butov4
Research Institute of Automatics, Moscow, Russia
Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region,
Institute for Theoretical and Applied Electromagnetics RAS, Moscow,
Institute of Radioengineering and Electronics RAS, Moscow, Russia
The paper is
received on April 1, 2015
A method of surface plasmon resonance
excitation in a copper film deposited onto a lateral surface of fiber, which
contains a tilted fiber Bragg grating in its core, is realized experimentally.
A reason for disappearance of distinct plasmon resonance is determined. It is
shown that within some hours after the film deposition plasmon resonance is
subject to redshift, accompanied by broadening, which leads to the resonance
evanescence. These effects are in good agreement with calculation, which takes
the copper degradation into account. A characteristic lifetime of the copper
film is found.
plasmonic optical fiber sensor of
refractive index, tilted fiber Bragg grating, fiber cladding modes.