DFT Investigation of Electro-Optical Properties of a Novel Liquid Crystal Molecule Under Extraneous Electric Field (THz) | ||
| Progress in Physics of Applied Materials | ||
| دوره 6، شماره 1 - شماره پیاپی 10، تابستان 2026، صفحه 35-42 اصل مقاله (649.37 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22075/ppam.2025.38335.1156 | ||
| نویسندگان | ||
| Yadupati Kushwaha1؛ Satya bratt Pandey2؛ Sachin Kumar Singh2؛ Umesh Yadava* 1 | ||
| 1Department of Physics, DDU Gorakhpur University, Gorakhpur 273009, INDIA | ||
| 2Department of Chemistry, DDU Gorakhpur University, Gorakhpur 273009, INDIA | ||
| چکیده | ||
| This work presents theoretical investigations into the electro-optical response of an aroylhydrazone liquid crystal (LC) N-[2-Hydroxy-4-dodecylidene]-N′-[4′-dodecyloxybenzoyl]hydrazine (2HDDH) under the influence of terahertz (THz) range electric fields, a regime rarely explored for this class of materials. While previous studies on LC molecules have predominantly focused on static or low-frequency fields, the effect of high-frequency (THz) electric fields on their electro-optical properties remains largely unexplored, limiting the understanding of their potential in next-generation photonic and optoelectronic technologies. Using a theoretical framework originally developed for organic compounds and extended here to THz device contexts, we computed order parameter, birefringence, director angle, vertical electronic transitions, frontier molecular orbitals (HOMO–LUMO), and molecular electrostatic potential (MEP) surfaces. The finite field approach was employed to evaluate order parameter, birefringence, and magic angle, while DFT and TD-DFT calculations revealed high anisotropic polarizability (Δα = 466.45 Bohr³), a moderate dipole moment (μ = 5.67 D), and strong UV absorption. These results identify 2HDDH as a thermally stable, electro-optically active material with significant promise for THz-frequency optoelectronic applications, including advanced displays, sensors, and OLEDs. | ||
| کلیدواژهها | ||
| 2HDDH؛ Liquid crystal؛ Order parameters؛ UV-vis spectra؛ TD-DFT | ||
| مراجع | ||
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