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Proceedings Paper

Enhanced electric field sensing with metallic nanoparticles-doped photonic liquid crystal fibers
Author(s): Karolina Bednarska; Agata Budaszewska; Daniel Budaszewski; Miłosz Chychłowski; Sławomir Ertman; Piotr Lesiak; Paulina Oszwa; Bartosz Bartosewicz; Bartłomiej Jankiewicz; Roman Dąbrowski; Tomasz R. Wolinski
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Paper Abstract

Photonic liquid crystal fibers (PLCFs) have been studied for over a decade as an emerging field of sensing and telecommunication devices. Exciting properties of liquid crystals (LCs) infiltrating photonic crystal fibers (PCFs) can be additionally tuned by doping with various materials that are sensitive to external influences, such as an electric field or temperature. Among them, metallic nanoparticles (NPs) are gathering a great interest, due to their potential applications. NPs can be used to highly influence material properties of LCs as dielectric anisotropy, elastic constants, and viscosity. This may lead to many desirable effects, such as a decrease of the Fredericks threshold voltage or reduction of LC switching times. In this paper we doped a nematic LC with 2-nm gold (Au) and 8-nm silver (Ag) NPs, and infiltrated the prepared mixtures into photonic crystal fibers. We examined the influence of this doping in two different electric field systems, one with two flat copper electrodes, and second with four copper microelectrodes. Our results indicate that metallic NP (both Au and Ag) doping enhances sensitivity of the PLCF-based sensors to an electric field and decreases the threshold voltage. Additionally, due to smaller distances between the electrodes, the proposed four microelectrode system requires lower voltages to effectively tune the PLCF.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111992V (28 August 2019); doi: 10.1117/12.2539989
Show Author Affiliations
Karolina Bednarska, Warsaw Univ. of Technology (Poland)
Agata Budaszewska, Warsaw Univ. of Technology (Poland)
Daniel Budaszewski, Warsaw Univ. of Technology (Poland)
Miłosz Chychłowski, Warsaw Univ. of Technology (Poland)
Sławomir Ertman, Warsaw Univ. of Technology (Poland)
Piotr Lesiak, Warsaw Univ. of Technology (Poland)
Paulina Oszwa, Warsaw Univ. of Technology (Poland)
Bartosz Bartosewicz, Military Univ. of Technology (Poland)
Bartłomiej Jankiewicz, Military Univ. of Technology (Poland)
Roman Dąbrowski, Military Univ. of Technology (Poland)
Tomasz R. Wolinski, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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