Open AccessBloch surface wave resonance in photonic crystal fibers: towards ultra-wide range refractive index sensors
Author(s) -
Esteban Gonzalez-Valencia,
Rodrigo Acuña Herrera,
Pedro Torres
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.008236
Subject(s) - refractive index , materials science , photonic crystal fiber , photonic crystal , optics , surface plasmon resonance , dielectric , optoelectronics , figure of merit , surface wave , surface plasmon , resonance (particle physics) , optical fiber , plasmon , wavelength , nanotechnology , physics , particle physics , nanoparticle
In this work, a new approach based on the use of a one-dimensional photonic crystal (1DPC) made of dielectric layers with alternating refractive indexes deposited inside a photonic crystal fiber (PCF) is proposed as a suitable platform for the excitation of Bloch surface waves (BSWs). The presence of an additional dielectric layer on the 1DPC modifies the local effective refractive index, enabling a direct manipulation of the BSWs. In particular, we investigate BSW resonance conditions in a 1DPC of alternating layers of TiO 2 and SiO 2 deposited inside a three-hole suspended-core PCF to design an ultra-wide range refractive index sensor in the near infrared. The obtained simulation results indicate that BSW sensors based on PCF could be an alternative to surface plasmon resonance (SPR) sensors, with a ultrahigh sensing figure-of-merit, which might facilitate applications in high-resolution refractive index sensing.