Effect of TiO2 nanoparticle doping on the performance of electrically-controlled nematic liquid crystal core waveguide switch

Mukesh Sharma; Aloka Sinha; M. R. Shenoy

doi:10.1016/j.optmat.2015.09.012

Effect of TiO₂ nanoparticle doping on the performance of electrically-controlled nematic liquid crystal core waveguide switch

Mukesh Sharma, Aloka Sinha^*, M. R. Shenoy

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A liquid crystal (LC) core waveguide has been designed and fabricated using nanocolloid of the nematic liquid crystal 5CB, doped with TiO₂ nanoparticles, as the core. Nematic liquid crystals doped with small amount of nanoparticles can have significantly altered electro-optic response. The performance of the fabricated LC core waveguide as an optical-switch has been studied, and the experimental result shows that the threshold voltage for switching is reduced from 1 V to 0.25 V due to TiO₂ nanoparticle dopant-concentration of 2.0 wt.%. The overall optimal performance of the waveguide switch, in terms of threshold voltage, extinction ratio, and response time, is achieved for a dopant-concentration of 0.5 wt.%.

Original language	English
Pages (from-to)	292-296
Number of pages	5
Journal	Optical Materials
Volume	49
DOIs	https://doi.org/10.1016/j.optmat.2015.09.012
State	Published - Nov 2015
Externally published	Yes

Keywords

Dielectric anisotropy
Electro-optical waveguide devices
Liquid crystal devices
Optical switching devices
Titanium dioxide nanoparticles

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10.1016/j.optmat.2015.09.012

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title = "Effect of TiO2 nanoparticle doping on the performance of electrically-controlled nematic liquid crystal core waveguide switch",

abstract = "A liquid crystal (LC) core waveguide has been designed and fabricated using nanocolloid of the nematic liquid crystal 5CB, doped with TiO2 nanoparticles, as the core. Nematic liquid crystals doped with small amount of nanoparticles can have significantly altered electro-optic response. The performance of the fabricated LC core waveguide as an optical-switch has been studied, and the experimental result shows that the threshold voltage for switching is reduced from 1 V to 0.25 V due to TiO2 nanoparticle dopant-concentration of 2.0 wt.%. The overall optimal performance of the waveguide switch, in terms of threshold voltage, extinction ratio, and response time, is achieved for a dopant-concentration of 0.5 wt.%.",

keywords = "Dielectric anisotropy, Electro-optical waveguide devices, Liquid crystal devices, Optical switching devices, Titanium dioxide nanoparticles",

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year = "2015",

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doi = "10.1016/j.optmat.2015.09.012",

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journal = "Optical Materials",

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T1 - Effect of TiO2 nanoparticle doping on the performance of electrically-controlled nematic liquid crystal core waveguide switch

AU - Sharma, Mukesh

AU - Sinha, Aloka

AU - Shenoy, M. R.

PY - 2015/11

Y1 - 2015/11

N2 - A liquid crystal (LC) core waveguide has been designed and fabricated using nanocolloid of the nematic liquid crystal 5CB, doped with TiO2 nanoparticles, as the core. Nematic liquid crystals doped with small amount of nanoparticles can have significantly altered electro-optic response. The performance of the fabricated LC core waveguide as an optical-switch has been studied, and the experimental result shows that the threshold voltage for switching is reduced from 1 V to 0.25 V due to TiO2 nanoparticle dopant-concentration of 2.0 wt.%. The overall optimal performance of the waveguide switch, in terms of threshold voltage, extinction ratio, and response time, is achieved for a dopant-concentration of 0.5 wt.%.

AB - A liquid crystal (LC) core waveguide has been designed and fabricated using nanocolloid of the nematic liquid crystal 5CB, doped with TiO2 nanoparticles, as the core. Nematic liquid crystals doped with small amount of nanoparticles can have significantly altered electro-optic response. The performance of the fabricated LC core waveguide as an optical-switch has been studied, and the experimental result shows that the threshold voltage for switching is reduced from 1 V to 0.25 V due to TiO2 nanoparticle dopant-concentration of 2.0 wt.%. The overall optimal performance of the waveguide switch, in terms of threshold voltage, extinction ratio, and response time, is achieved for a dopant-concentration of 0.5 wt.%.

KW - Dielectric anisotropy

KW - Electro-optical waveguide devices

KW - Liquid crystal devices

KW - Optical switching devices

KW - Titanium dioxide nanoparticles

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JF - Optical Materials

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Effect of TiO₂ nanoparticle doping on the performance of electrically-controlled nematic liquid crystal core waveguide switch

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Keywords

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