Photonic band structure evolution of a honeycomb lattice in the presence of an external magnetic field.

A standard plane-wave expansion technique is used to investigate the evolution of the photonic band structure of a two-dimensional honeycomb lattice composed by cylindrical shell rods with dielectric permittivities [variant_greek_epsilon]1 and [variant_greek_epsilon]2, and embedded in a background with permittivity [variant_greek_epsilon]3. We have considered the effect of dispersive dielectric responses as well as the influence of an externally applied magnetic field aiming to obtain efficient tunable bandgaps. Present results suggest that a combination of a doped semiconductor constituent with an anisotropic geometry, which breaks symmetry and unfolds degeneracies, provides an efficient realization of photonic systems with tunable bandgaps. [ABSTRACT FROM AUTHOR]