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Optical-field-induced reorientation of nematic liquid crystal doped with FeTPPCl based on the resonant model

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Abstract

Optical-field-induced reorientation of 5CB doped with a 1% volume fraction of FeTPPCl (5,10,15,20–tetraphenylporphineiron(III) chloride) were studied. When excited by Ti:sapphire laser with an 82 MHz repetition rate and a 80 fs pulse duration, the reorientation threshold occurred at an intensity level of 1 mW/mm2 for the resonant absorption region, in contrast to the 115 mW/mm2 value for the transparent region. A guest resonant model is proposed to explain this anomalous phenomenon: when excited by absorbing light, the FeTPPCl molecule produces an intense resonance absorption which induces a very large dielectric anisotropy, and this therefore enhances the reorientation of the doped system. This phenomenon is very useful for using the liquid crystal as a nonlinear optical component.

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Authors and Affiliations

  1. School of Information Engineering, Guangdong University of Technology, Guangzhou, 510006, P.R. China

    X. Ying & L. Jie

  2. The State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen (Zhongshan) University, Guangzhou, 510275, P.R. China

    M. Li & J.Y. Zhou

  3. College of Chemistry and Life Science, China Three Gorges University, Yichang, Hubei Province, 443002, P.R. China

    L. Tao

Authors
  1. X. Ying
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  2. M. Li
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  3. L. Tao
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  4. L. Jie
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  5. J.Y. Zhou
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Correspondence to X. Ying.

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PACS

61.30; 64.70.Md

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Ying, X., Li, M., Tao, L. et al. Optical-field-induced reorientation of nematic liquid crystal doped with FeTPPCl based on the resonant model. Appl. Phys. A 86, 207–211 (2007). https://doi.org/10.1007/s00339-006-3731-9

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  • DOI: https://doi.org/10.1007/s00339-006-3731-9

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