20.500.12556/RUL-169963 Optically induced holographic gratings in a ferroelectric nematic liquid crystal activated by an electric field One of the fundamental components in modern optics and advanced photonics is diffraction grating, crucial for designing compact and highly tunable advanced optical devices. We demonstrate formation of a dynamic diffraction grating induced by two wave-mixing in a ferroelectric nematic liquid crystal (N$_\mathrm{F}$LC) with the assistance of a weak electric field. A grating with a first-order diffraction efficiency of $\sim~3.8~\%$ was recorded with a recording intensity of 64 mW/cm$^2$. The corresponding effective nonlinear refractive index n$_2$ was around 2.6 × 10$^{-2}$ cm$^2$/W, which is notably higher than that of pure nematic liquid crystals. The underlying mechanism is attributed to the reorientation of the director field caused by the synergic effect of combined torques originating from the optical and electric fields. The observed high nonlinearity offers a pathway for designing novel versatile liquid crystal-based devices, to our knowledge, expanding potential applications of ferroelectric nematics in various nonlinear and electro-optical processes. optics diffraction gratings ferroelectric nematic liquid crystals electric field optika uklonske mrežice feroelektrični nematski tekoči kristali električno polje true false true Angleški jezik Slovenski jezik Članek v reviji 2025-06-27 08:16:09 2025-06-27 08:16:10 2025-06-28 04:07:59 0000-00-00 00:00:00 2025 0 0 Str. 4038-4041 no. 12 Vol. 50 2025 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2026-06-11 535.421 0146-9592 10.1364/OL.564279 239157763 Faheem.pdf Faheem.pdf 1 0280DCC95761322AE9F8E2FAAD095847 f1df3fb7a075e26772f34be94e6f6ac2ce1317aa9b3cc1d2e3c6913bbf25d168 7470c90b-5323-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211822 https://opg.optica.org/ol/abstract.cfm?uri=ol-50-12-4038 0 7bc8bf87-5323-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211823 Fakulteta za matematiko in fiziko 0 0 0