Liquid-Crystal Metasurfaces Self-Assembled on Focused Ion Beam Patterned Polymer Layers: Electro-Optical Control of Light Diffraction and Transmission

ACS Applied Materials & Interfaces
Maxim V GorkunovS P Palto

Abstract

Self-assembling of liquid-crystal metasurfaces on polymer layers patterned by a focused ion beam manifests itself in distinctly colored optical transmission, as light from certain spectral bands is efficiently diffracted by the periodic liquid crystal modulations. We explore the metasurface electro-optics by applying voltage across the liquid crystal to straighten its director distribution and reroute the diffracted light into the direct transmission. We show that the characteristic times of switching from the diffracting to the transmitting state can be decreased down to a millisecond by increasing the driving voltage up to 6-8 V, while the main part of the relaxation back into the periodically deformed diffracting state occurs within about a few milliseconds, i.e., by an order of magnitude faster than the relaxation of the analogous homogeneous electro-optical liquid crystal cell. We explain the profound dynamics in terms of superimposed exponential modes governed by an interplay of the metasurface geometric parameters, the liquid crystal viscosity, and elasticity.

References

Oct 17, 2008·Optics Letters·Chulwoo Oh, Michael J Escuti
Mar 4, 2011·Optics Express·Sergei SlussarenkoEnrico Santamato
Apr 11, 2013·Optics Express·Manuel DeckerYuri S Kivshar
Dec 11, 2013·Optics Letters·Fan FanHoi Sing Kwok
Mar 10, 2015·ACS Nano·Jürgen SautterYuri S Kivshar
Aug 10, 2016·Optics Express·Luciano De SioBrian R Kimball
Dec 10, 2017·Optics Express·Zu-Wen XieKuo-Ping Chen
Jan 13, 2018·Applied Optics·Luciano De SioBrian R Kimball
Aug 19, 2018·Optics Express·Irina V KasyanovaSerguei P Palto
Sep 11, 2019·Beilstein Journal of Nanotechnology·Maxim V GorkunovSerguei P Palto

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Citations

Mar 7, 2021·Micromachines·Rowan MorrisMamatha Nagaraj

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