Periodically-segmented liquid crystal core waveguides

We report the fabrication and characterization of electrically-tunable periodically segmented waveguides (PSWs) with different duty cycles of 0.25, 0.33, 0.50 and 0.76, using the nematic liquid crystal 5CB as the guiding layer, and the negative photoresist AZ15nXT as the cladding. The experimental r...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2017-09, Vol.50 (38), p.385107
Main Authors: Sharma, Mukesh, Shenoy, M R, Sinha, Aloka
Format: Article
Language:English
Subjects:
electrooptic devices
liquid crystal devices
periodically-segmented waveguide
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Summary:We report the fabrication and characterization of electrically-tunable periodically segmented waveguides (PSWs) with different duty cycles of 0.25, 0.33, 0.50 and 0.76, using the nematic liquid crystal 5CB as the guiding layer, and the negative photoresist AZ15nXT as the cladding. The experimental results show that light diffracts and re-focuses periodically on propagation through the liquid crystal (LC) core PSW, when an external voltage is applied to the periodically segmented electrodes. The performance of the fabricated LC core PSWs are analyzed in terms of effective refractive index, output power and duty cycle. The electrically-tunable LC core PSWs have potential application in the realization of optical filters, polarizers and dynamic mode size converters.
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aa83f1