Enhanced electric field sensing with metallic nanoparticles-doped photonic liquid crystal fibers

Karolina Bednarska; Agata Budaszewska; Daniel Budaszewski; Miłosz Chychłowski; Sławomir Ertman; Piotr Lesiak; Paulina Oszwa; Bartosz Bartosewicz; Bartłomiej Jankiewicz; Roman Dąbrowski; Tomasz R. Wolinski

doi:10.1117/12.2539989

28 August 2019 Enhanced electric field sensing with metallic nanoparticles-doped photonic liquid crystal fibers

Karolina Bednarska, Agata Budaszewska, Daniel Budaszewski, Miłosz Chychłowski, Sławomir Ertman, Piotr Lesiak, Paulina Oszwa, Bartosz Bartosewicz, Bartłomiej Jankiewicz, Roman Dąbrowski, Tomasz R. Wolinski

Author Affiliations +

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111992V (2019) https://doi.org/10.1117/12.2539989
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

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.

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Karolina Bednarska, Agata Budaszewska, Daniel Budaszewski, Miłosz Chychłowski, Sławomir Ertman, Piotr Lesiak, Paulina Oszwa, Bartosz Bartosewicz, Bartłomiej Jankiewicz, Roman Dąbrowski, and Tomasz R. Wolinski "Enhanced electric field sensing with metallic nanoparticles-doped photonic liquid crystal fibers", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111992V (28 August 2019); https://doi.org/10.1117/12.2539989

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KEYWORDS

Gold

Nanoparticles

Electrodes

Liquid crystals

Silver

Photonic liquid crystal fibers

Photonic crystal fibers

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