J. Eur. Opt. Soc.-Rapid Publ.
Volume 15, Number 1, 2019
Highlights of EOSAM 2018
|Number of page(s)||6|
|Published online||08 May 2019|
Tapered photonic crystal fibers coated with ultra-thin films for highly sensitive bio-chemical sensing
Centro de Investigaciones en Optica, Division of Photonics, Loma del Bosque 115, Colonia Lomas del Campestre, 37150, Leon, Guanajuato, Mexico
2 Dept. of Physics, A.A. Kuleshov Mogilev State University, 1 Kosmonavtov Str, 212009, Mogilev, Belarus
Accepted: 25 April 2019
Background: Photonic crystal fiber Mach-Zehnder modal interferometers based on no adiabatic tapered fibers are perspective for bio-chemical sensing, since they have very high refractive index sensitivity and it is possible for them to use a very small quantity of investigated samples. To obtain a desirable sensitivity to a needed analyte, it was proposed to coat a sensing surface of the refractive index sensor with ultra-thin films.
Methods: In this work, we reported on a no adiabatic tapered special photonic crystal fiber coated with an ultra-thin layer of a Bovine Serum Albumin (BSA) antigen or with an 8 nm palladium film to detect interaction between the BSA antigen and an anti-BSA antibody or for fast detection of hydrogen concentrations, respectively.
Results and conclusion: During our experiments, we received a record detection limit of 125 pg/ml of the anti-BSA antibody concentration. Fast detection of hydrogen concentrations up to 5.6 vol% was carried out. By using a proposed electrodynamics model of a hydrogen sensor, an optimal taper sensing length was determined.
Key words: Optical fiber devices / Optical fiber sensors / Optical fiber interferometer / Photonic crystal fibers
© The Author(s) 2019
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