Use of electrokinetic phenomena in an optofluid cell with polymer substrates
https://doi.org/10.18384/2310-7251-2022-3-59-74-86
Abstract
Aim. We describe the use of electrokinetic phenomena in liquid crystals to produce a new class of microfluidics devices, i.e. optofluidics designed to control electromagnetic radiation, including the THz frequency range.
Methodology. Use is made of an optical method for studying changes in the orientational structure in LC layers caused by a shear flow generated by an electroosmotic pump. The LC behavior in an experimental cell containing an electroosmotic pump and flat layers of a nematic liquid crystal is simulated.
Results. We have obtained experimental dependences of the intensity of polarized radiation passing through flat LC layers on the control voltage applied to the electroosmotic pump. Results of calculations of hydrodynamic and mechano-optical characteristics of an experimental LC cell are presented.
Research implications. A new idea has been implemented, which consists in using a shear flow induced by an electroosmotic pump to control optical radiation. The developed design of the LC cell and the obtained experimental results can be used to develop new devices for controlling electromagnetic radiation, including the THz frequency range.
Keywords
nematic liquid crystal,
terahertz range,
electrokinetic phenomena,
osmotic flow,
director configuration,
optical radiation intensity,
E7,
polypropylene
Supporting agencies: This work was supported by Ministry of Education and Science of Russian Federation (Grant No. FSFZ-2020- 0019) and Russian Foundation for Basic Research (RFBR Project No. 19-32-90055)
About the Authors
A. Sh. Saidgaziev
MIREA – Russian Technological University
Russian Federation
Russian Federation
Saidgaziev Aivr Shavkatovich –Research Assistant, Problematic Laboratory of Molecular Acoustics
prosp. Vernadskogo 78, Moscow 119454
S. V. Pasechnik
MIREA – Russian Technological University
Russian Federation
Russian Federation
Pasechnik Sergey Veniaminovich – Dr. Sci. (Phys.-Math.), Laboratory Head, Problematic Laboratory of Molecular Acoustics
prosp. Vernadskogo 78, Moscow 119454
D. V. Shmeleva
MIREA – Russian Technological University
Russian Federation
Russian Federation
Shmeleva Dina Vladimirovna – Cand. Sci. (Phys.-Math.), Senior Researcher, Problematic Laboratory of Molecular Acoustics
prosp. Vernadskogo 78, Moscow 119454
S. S. Kharlamov
MIREA – Russian Technological University
Russian Federation
Russian Federation
Kharlamov Semyon Sergeevich – Research Assistant, Problematic Laboratory of Molecular Acoustics
prosp. Vernadskogo 78, Moscow 119454
A. A. Vasilyeva
MIREA – Russian Technological University
Russian Federation
Russian Federation
Vasilieva Anastasia Alekseevna – Engineer, Problematic Laboratory of Molecular Acoustics
prosp. Vernadskogo 78, Moscow 119454
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