Electro-optical switching of liquid crystal diffraction gratings by using surface relief effect in the photopolymer

2007 ◽  
Vol 273 (2) ◽  
pp. 367-369 ◽  
Author(s):  
Kotakonda Pavani ◽  
Izabela Naydenova ◽  
Suzanne Martin ◽  
Jallapuram Raghavendra ◽  
Robert Howard ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Surface Relief ◽  
Optical Switching ◽  
Diffraction Gratings ◽  
Relief Effect ◽  
Surface Relief Effect

Simulation of surface relief effect on ALD process

2006 ◽  
Vol 36 (1-2) ◽  
pp. 36-41 ◽  
Author(s):  
I.G. Neizvestny ◽  
N.L. Shwartz ◽  
Z. Sh. Yanovitskaja ◽  
A.V. Zverev
Keyword(s):  
Surface Relief ◽  
Relief Effect ◽  
Surface Relief Effect

scholarly journals Design of Tunable Holographic Liquid Crystalline Diffraction Gratings

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6789
Author(s):  
Katarzyna A. Rutkowska ◽  
Anna Kozanecka-Szmigiel
Keyword(s):  
Liquid Crystal ◽  
Communication Networks ◽  
Optical Communication ◽  
Liquid Crystalline ◽  
Incident Light ◽  
Diffraction Gratings ◽  
Lagrange Equations ◽  
Experimental Conditions ◽  
Molecular Distribution ◽  
Polarization Gratings

Tunable diffraction gratings and phase filters are important functional devices in optical communication and sensing systems. Polarization gratings, in particular, capable of redirecting an incident light beam completely into the first diffraction orders may be successfully fabricated in liquid crystalline cells assembled from substrates coated with uniform transparent electrodes and orienting layers that force a specific molecular distribution. In this work, the diffraction properties of liquid crystal (LC) cells characterized by a continually rotating cycloidal director pattern at the cell substrates and in the bulk, are studied theoretically by solving a relevant set of the Euler-Lagrange equations. The electric tunability of the gratings is analyzed by estimating the changes in liquid crystalline molecular distribution and thus in effective birefringence, as a function of external voltage. To the best of our knowledge, such detailed numerical calculations have not been presented so far for liquid crystal polarization gratings showing a cycloidal director pattern. Our theoretical predictions may be easily achieved in experimental conditions when exploiting, for example, photo-orienting material, to induce a permanent LC alignment with high spatial resolution. The proposed design may be for example, used as a tunable passband filter with adjustable bandwidths, thus allowing for potential applications in optical spectroscopy, optical communication networks, remote sensing and beyond.

scholarly journals Fabrication of switchable liquid crystal devices using surface relief gratings in photopolymer

2007 ◽  
Vol 20 (S1) ◽  
pp. 198-201 ◽  
Author(s):  
Pavani Kotakonda ◽  
Izabela Naydenova ◽  
Robert Howard ◽  
Suzanne Martin ◽  
Vincent Toal
Keyword(s):  
Liquid Crystal ◽  
Surface Relief ◽  
Liquid Crystal Devices ◽  
Surface Relief Gratings

Label-free detection of C-Reactive protein using bioresponsive hydrogel-based surface relief diffraction gratings

2021 ◽  
pp. 113561
Author(s):  
María Isabel Lucío ◽  
Andy Hernández Montoto ◽  
Estrella Fernández ◽  
Sabri Alamri ◽  
Tim Kunze ◽  
...  
Keyword(s):  
Surface Relief ◽  
Diffraction Gratings ◽  
Label Free ◽  
C Reactive Protein ◽  
Reactive Protein ◽  
Label Free Detection
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