2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106621Accurate analytic approximations are developed for the band gap boundaries and surface waves of a 1D photonic crystal, making use of the semiclassical theory recently developed by the authors: [Phys. Rev. E {69} (2004) 016612 and {70} (2004) 016606]. These analytic results provide useful insight on systematics of surface states.14 pages, 11 figuresOpticstext