20.500.12556/RUL-128572 Photonic properties of heliconical liquid crystals Periodic birefringence is today extensively explored as an interesting route for controlling the flow of light. Distinctly, complex fluids with periodic modulations of birefringence can perform as photonic crystals, with the main examples being cholesteric and blue phases birefringent profiles. Here we demonstrate the characteristics of light propagation in heliconical liquid crystal and demonstrate their tunable optical and photonic properties, specifically as onedimensional photonic crystals, in the regime of heliconical pitch comparable to the wavelength of light. Using a combination of frequency- and time-domain simulations, we show the existence and properties of the photonic band gap, as determined by the relative handedness of the polarization of light and the heliconical structure. We calculate photonic eigenmodes of the light and find the emergence of electric field component along the propagation axis of light, for both left- and right-handed polarization of light, which in turn results in strongly spatially varying Poynting vector that exhibits circular-like and four-leaf-clover-like patterns. As this variation of the Poynting vector is tunable with various material parameters and external (electric) fields, heliconical birefringence photonic crystals show interesting potential for use in tunable photonic applications, such as complex modulation of light beams. optics photonics liquid crystals optika fotonika tekoči kristali true false true Angleški jezik Slovenski jezik V članku navedeno: "© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement"; s povezavo https://www.osapublishing.org/library/license_v1.cfm. (20. 7. 2021) Članek v reviji 2021-07-20 11:37:43 2021-07-20 11:37:44 2023-05-30 03:27:12 0000-00-00 00:00:00 2018 0 0 Str. 23265-23277 no. 18, art. 335156 Vol. 26 2018 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535.5 1094-4087 10.1364/OE.26.023265 3232100 RAZ_Pusovnik_Anja_2018.pdf RAZ_Pusovnik_Anja_2018.pdf 1 3F40C559CFC60DDDDED596C48AAEDA09 a4c6a976d176779be143c5d4d16f2fb7665b726ccc0a97f75cd7505bfef5c88b 9e818121-e93e-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145358 https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-26-18-23265&id=396510 0 9073f6ad-e93e-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145357 Fakulteta za matematiko in fiziko 0 0 0