1.
Phys Rev Lett
; 108(3): 037401, 2012 Jan 20.
Artigo
em Inglês
| MEDLINE
| ID: mdl-22400783
RESUMO
We demonstrate a mesoscopic self-collimation effect in photonic crystal superlattices consisting of a periodic set of all-positive index 2D photonic crystal and homogeneous layers. We develop an electromagnetic theory showing that diffraction-free beams are observed when the curvature of the optical dispersion relation is properly compensated for. This approach allows us to combine slow-light regime together with self-collimation in photonic crystal superlattices presenting an extremely low filling ratio in air.