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    • Interdependency among electro-optic characteristics and absorption coefficient of homeotropically aligned liquid crystal considering Beer’s law theory

      CHINKY PANKAJ KUMAR ANKIT RAI DOGRA PRAVEEN MALIK

      Volume 45 Published: 16 May 2022 Article ID 0085

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      https://www.ias.ac.in/article/fulltext/boms/045/0085

    • Keywords

       

      Liquid crystal; nanoparticles; homeotropically aligned liquid crystal; azo dichroic dye.

    • Abstract

       

      In the present study, interdependency among electro-optic (E-O) characteristics and absorption coefficient of homeotropically aligned liquid crystal (HALC) considering Beer’s law theory has been studied. Specifically, HALC cellswere prepared using uniform dispersion of ZnO nanoparticles into the nematic liquid crystal without applying any surface treatment to the substrates. Then azo dichroic dye (orange) was added in a fixed concentration to the prepared nanoparticles dispersed LC mixture. The morphological and absorption characteristics of prepared HALC cells were found to be improved with the addition of azo dichroic dye. The optical textures observed at macroscopic and microscopic levels are in correspondence with each other and showed excellent OFF/ON switching with magnificently dark and bright views. Moreover, HALC cells doped with azo dichroic dye exhibited a higher value of absorption coefficient with an improved contrast ratio. Thus, a good consistency was observed among experimentally observed E-O characteristics and theoretically measured absorption coefficient.

    • Author Affiliations

       

      CHINKY PANKAJ KUMAR1 ANKIT RAI DOGRA1 PRAVEEN MALIK2

      1. Centre for Liquid Crystal Research, Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura 140401, India
      2. Liquid Crystal Laboratory, Department of Physics, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar 144011, India

    • Dates

       
      Published
      16 May 2022
      Manuscript received
      16 September 2021
      Accepted
      31 December 2021
      Final version published online
      16 May 2022

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