Unfolding the band structure of non-crystalline photonic band gap materials.

ABSTRACT: Non-crystalline photonic band gap (PBG) materials have received increasing attention, and sizeable PBGs have been reported in quasi-crystalline structures and, more recently, in disordered structures. Band structure calculations for periodic structures produce accurate dispersion relations, which determine group velocities, dispersion, density of states and iso-frequency surfaces, and are used to predict a wide-range of optical phenomena including light propagation, excited-state decay rates, temporal broadening or compression of ultrashort pulses and complex refraction phenomena. However, band calculations for non-periodic structures employ large super-cells of hundreds to thousands building blocks, and provide little useful information other than the PBG central frequency and width. Usin

SUBMITTER: Tsitrin S 

PROVIDER: S-EPMC4542607 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature