2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27029We investigate the propagation of electromagnetic waves in the core of a winding number one string defect with isotropic core in nematic liquid crystals. We numerically solve wave equations for the TE mode and show the existence of guided modes arising due to the variation of the refractive index as a function of the scalar order parameter.8 pages (LATEX), figures not included (available on request), NSF-ITP-93-154Condensed Mattertext