Defects in periodic refractive index structures with omnidirectional gap. Superficies y Vacío, [S. l.], v. 25, n. 4, p. 218–222, 2012. Disponível em: https://www.superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/191. Acesso em: 16 dec. 2025.