An Electrically Controlled Nematic Liquid Crystal Core Waveguide With a Low Switching Threshold

M. R. Shenoy; Mukesh Sharma; Aloka Sinha

doi:10.1109/JLT.2015.2404337

An Electrically Controlled Nematic Liquid Crystal Core Waveguide With a Low Switching Threshold

M. R. Shenoy, Mukesh Sharma, Aloka Sinha

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

Abstract

We demonstrate an electrically-controlled liquid crystal (LC) core waveguide, using 4-cyano-4′-pentylbiphenyl (5CB) nematic liquid crystal, fabricated on a glass substrate. A negative photoresist, AZ15nXT layer was coated on the glass substrate to realize a channel waveguide of core thickness 4.8 μm. The LC core waveguide exhibits strong differential attenuation for propagation of the TE- (horizontal) and TM-like (vertical) polarizations of light. The experimental results show that the output power suddenly drops down by several dB at an applied voltage of 1 V, for a waveguide of length 10 mm, due to the re-orientation of the LC molecules. The waveguide can be used as an optical switch, as well as an optical attenuator.

Original language	English
Article number	7042783
Pages (from-to)	1948-1953
Number of pages	6
Journal	Journal of Lightwave Technology
Volume	33
Issue number	10
DOIs	https://doi.org/10.1109/JLT.2015.2404337
State	Published - 15 May 2015
Externally published	Yes

Keywords

Electrooptic devices
liquid crystal devices
liquid crystals
optical switching devices

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10.1109/JLT.2015.2404337

Cite this

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title = "An Electrically Controlled Nematic Liquid Crystal Core Waveguide With a Low Switching Threshold",

abstract = "We demonstrate an electrically-controlled liquid crystal (LC) core waveguide, using 4-cyano-4′-pentylbiphenyl (5CB) nematic liquid crystal, fabricated on a glass substrate. A negative photoresist, AZ15nXT layer was coated on the glass substrate to realize a channel waveguide of core thickness 4.8 μm. The LC core waveguide exhibits strong differential attenuation for propagation of the TE- (horizontal) and TM-like (vertical) polarizations of light. The experimental results show that the output power suddenly drops down by several dB at an applied voltage of 1 V, for a waveguide of length 10 mm, due to the re-orientation of the LC molecules. The waveguide can be used as an optical switch, as well as an optical attenuator.",

keywords = "Electrooptic devices, liquid crystal devices, liquid crystals, optical switching devices",

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N2 - We demonstrate an electrically-controlled liquid crystal (LC) core waveguide, using 4-cyano-4′-pentylbiphenyl (5CB) nematic liquid crystal, fabricated on a glass substrate. A negative photoresist, AZ15nXT layer was coated on the glass substrate to realize a channel waveguide of core thickness 4.8 μm. The LC core waveguide exhibits strong differential attenuation for propagation of the TE- (horizontal) and TM-like (vertical) polarizations of light. The experimental results show that the output power suddenly drops down by several dB at an applied voltage of 1 V, for a waveguide of length 10 mm, due to the re-orientation of the LC molecules. The waveguide can be used as an optical switch, as well as an optical attenuator.

AB - We demonstrate an electrically-controlled liquid crystal (LC) core waveguide, using 4-cyano-4′-pentylbiphenyl (5CB) nematic liquid crystal, fabricated on a glass substrate. A negative photoresist, AZ15nXT layer was coated on the glass substrate to realize a channel waveguide of core thickness 4.8 μm. The LC core waveguide exhibits strong differential attenuation for propagation of the TE- (horizontal) and TM-like (vertical) polarizations of light. The experimental results show that the output power suddenly drops down by several dB at an applied voltage of 1 V, for a waveguide of length 10 mm, due to the re-orientation of the LC molecules. The waveguide can be used as an optical switch, as well as an optical attenuator.

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An Electrically Controlled Nematic Liquid Crystal Core Waveguide With a Low Switching Threshold

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