Birefringence and order parameter studies in ferroelectric liquid crystals using laser transmission technique
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B. Gowri Sankara Rao
Abstract
Birefringence of the ferro electric liquid crystals (FLCs): (S)-(−)-2-methylbutyl 4′-(4ʺ-n-alkanoyloxybenzoyloxy) biphenyl-4-carboxylates (S-MB-nB-BC) where n = 16 and 18 is determined experimentally using laser transmission technique. In this experimental technique, the light coming out from the laser source (of wavelength 633 nm) passes through the polarizer and analyzer via FLC sample under crossed position. Optical intensities transmitted from the sample fall on the phototransistor through the analyzer. Phototransistor is a photo detector in which the transmitted light from the analyzer is converted into the electric response and measured in terms of voltage. These voltage measurements are used to determine the birefringence values of the samples. Further, order parameter is also determined. The results are compared with image analysis technique values along with phase transition temperatures, which are in good agreement.
Funding source: University Grants Commission
Award Identifier / Grant number: No. F.18-1/2011
Funding source: University Grants Commission Departmental Special Assistance
Award Identifier / Grant number: No.: F.530/1/DSA-1/2015 (SAP-1)
Acknowledgments
One of the authors (SSS) is grateful to University Grants Commission for providing BSR Faculty fellowship No. F.18-1/2011 (BSR) Dt: 04/01/2017. The authors also gratefully acknowledge University Grants Commission Departmental Special Assistance at Level I program No.: F.530/1/DSA-1/2015 (SAP-1), dated 12 May 2015.
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by University Grants Commission for providing BSR Faculty fellowship No. F.18-1/2011(BSR) Dt: 04/01/2017. The authors also gratefully acknowledge University Grants Commission Departmental Special Assistance at Level I program No.: F.530/1/ DSA-1/2015 (SAP-1), dated 12 May 2015.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2020 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Dynamical Systems & Nonlinear Phenomena
- In search of hyperchaos in a high dimensional unmagnetized quantum plasma
- Multistability and chaotic scenario in a quantum pair-ion plasma
- Dust-acoustic Gardner solitons in cryogenic plasma with the effect of polarization in the presence of a quantizing magnetic field
- Quantum Theory
- Trace dynamics and division algebras: towards quantum gravity and unification
- Solid State Physics & Materials Science
- Birefringence and order parameter studies in ferroelectric liquid crystals using laser transmission technique
- Investigations on the g factors and local structure for the trigonal Ce3+ center in YAl3(BO3)4 crystal
- Fiber-optic Fabry–Perot temperature sensor based on the ultraviolet curable glue-filled cavity and two-beam interference principle
- Tuning the properties of RF sputtered tin sulphide thin films and enhanced performance in RF sputtered SnS thin films hetero-junction solar cell devices
Artikel in diesem Heft
- Frontmatter
- Dynamical Systems & Nonlinear Phenomena
- In search of hyperchaos in a high dimensional unmagnetized quantum plasma
- Multistability and chaotic scenario in a quantum pair-ion plasma
- Dust-acoustic Gardner solitons in cryogenic plasma with the effect of polarization in the presence of a quantizing magnetic field
- Quantum Theory
- Trace dynamics and division algebras: towards quantum gravity and unification
- Solid State Physics & Materials Science
- Birefringence and order parameter studies in ferroelectric liquid crystals using laser transmission technique
- Investigations on the g factors and local structure for the trigonal Ce3+ center in YAl3(BO3)4 crystal
- Fiber-optic Fabry–Perot temperature sensor based on the ultraviolet curable glue-filled cavity and two-beam interference principle
- Tuning the properties of RF sputtered tin sulphide thin films and enhanced performance in RF sputtered SnS thin films hetero-junction solar cell devices
