全正折射率层状光子晶体中的介观自准直和慢光
Mesoscopic self-collimation and slow light in all-positive index layered photonic crystals
摘要：
研究了由周期性的全正折射率二维光子晶体和均匀层组成的光子晶体超晶格中的介观自准直效应。我们发展了一个电磁理论，表明无衍射光束时，观察到的光学色散关系的曲率得到适当的补偿。这种方法允许在空气中呈现极低填充比的光子晶体超晶格中将慢光机制与自准直结合在一起。
英文摘要：
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 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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