Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.037401
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- Agence Nationale de la Recherche of France [ANR-09-BLAN-0124-01]
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0124] Funding Source: Agence Nationale de la Recherche (ANR)
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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.
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