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Thermal and electric field effects on the nonlinear optical response of a cyanobiphenyl liquid crystal doped with carbon dots

The present study is devoted to the investigation of the nonlinear optical response of a cyanobiphenyl liquid crystal (8CB) doped with carbon dots derived from dansyl chloride (CD-DsCl). Using the time-resolved z-scan technique, it is investigated how the CD-DsCl addition affects the nonlinear refra...

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Bibliographic Details
Published in:Journal of molecular liquids 2024-02, Vol.395, p.123870, Article 123870
Main Authors: Terceiro, P.S., de Oliveira, R.G.S., Alves, R.T., Davi, L.B.O., Barbosa, C.D.A.E.S., Pereira, Maria S.S., de Oliveira, I.N.
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Language:English
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Summary:The present study is devoted to the investigation of the nonlinear optical response of a cyanobiphenyl liquid crystal (8CB) doped with carbon dots derived from dansyl chloride (CD-DsCl). Using the time-resolved z-scan technique, it is investigated how the CD-DsCl addition affects the nonlinear refractive coefficient of planar liquid crystal samples. The temperature dependence of nonlinear optical responses of pristine and doped samples are analyzed close to smectic-A - nematic and nematic - isotropic phase transitions. Furthermore, the effects of an external electric field are analyzed. Our results show that doped 8CB samples may exhibit an enhanced nonlinear optical response, which depends on the strength of the external field. •The effects of carbon dots addition on a smectic liquid crystal's thermal and optical properties are studied.•The time-resolved z-scan technique is used to determine the nonlinear optical response of pristine and doped samples.•Our results show that the addition of carbon dots increases liquid crystal samples' nonlinear optical response.•An external electric field can tune the nonlinear refractive index of pristine and doped samples.•Hybrid soft materials based on carbon dots and liquid crystals emerge as promising candidates for use in optical devices.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2023.123870