Open AccessReflectivity of semi-infinite one-dimensional photonic crystal composed of alternate layers of ordinary material and negative refraction material
Author(s) -
Wang Zhen-De,
Nian-Hua Liu
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.559
Subject(s) - photonic crystal , optics , band gap , negative refraction , polarization (electrochemistry) , physics , reflection (computer programming) , lattice constant , reflectivity , condensed matter physics , sign (mathematics) , materials science , refraction , lattice (music) , refractive index , mathematical analysis , diffraction , mathematics , chemistry , computer science , acoustics , programming language
The reflection on the semi-infinite periodic one-dimensional photonic crystal composed of alternate layers of ordinary material and negative refraction material is investigated. We find that the reflectivity is exactly equal to 1 in the forbidden frequency gap, and in the pass band, it averages out the rapid fluctuation of reflection of the finite structure. When the optical thickness of both ordinary material and negative refraction material are in opposite sign, there will be a zero-n band gap. We analytically prove that the zero-n band gap is insensitive to incident angle and polarization. It is also anticipated that the zero-n band gap is invariant with the scaling of lattice constant.