Open AccessSymmetry-dependency of anticrossing phenomena in slab-type photonic crystals
Author(s) -
Carlo Barth,
Sven Burger,
Christiane Becker
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.010931
Subject(s) - slab , nanoimprint lithography , photonic crystal , symmetry (geometry) , optics , materials science , refractive index , lithography , condensed matter physics , silicon , physics , optoelectronics , geometry , medicine , alternative medicine , mathematics , pathology , fabrication , geophysics
The optical properties of photonic crystals (PhCs) are strongly affected by their spatial symmetry characteristics. We observe anticrossing phenomena for large-area slab-type silicon PhCs sandwiched between a glass substrate and air. If a glass superstrate plus an index-matching fluid is added, thus establishing a mirror symmetry in z-direction, the anticrossing disappears. These characteristics are analyzed numerically using a finite-element Maxwell solver, and experimentally using large area samples made by nanoimprint lithography. We further discuss the findings by symmetry considerations.