Naslov
Magnetically Tunable Liquid Crystal-Based Optical Diffraction Gratings

Autori
Bošnjaković, Dejan ; Sebastián, Nerea ; Drevenšek-Olenik, Irena

Izvornik
Polymers (2073-4360) 12 (10) (2020); 1-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Ferromagnetic materials ; Liquid crystals ; Optical diffractive structures ; Transmission gratings
(ferromagnetic materials ; liquid crystals ; optical diffractive structures ; transmission gratings)

Sažetak
We present a theoretical analysis of optical diffractive properties of magnetically tunable optical transmission gratings composed of periodically assembled layers of a polymer and a ferromagnetic liquid crystal (LC). The orientational structure of the LC layers as a function of an applied magnetic field is calculated by minimization of the Landau-de Gennes free energy for ferromagnetic LCs, which is performed numerically and also analytically by using the one-constant approximation and the approximations of the high and the low magnetic fields. Optical diffractive properties of the associated diffraction structure are calculated numerically in the framework of rigorous coupled-wave analysis (RCWA). The presented methodology provides a basis for designing new types of diffractive optical element based on ferromagnetic LCs and simulating their operation governed by the in-plane magnetic field.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

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