Garanovich Ivan L, Sukhorukov Andrey A, Kivshar Yuri S
Nonlinear Physics Centre and Centre for Ultra-high bandwidth Devices for Optical Systems, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Dec;74(6 Pt 2):066609. doi: 10.1103/PhysRevE.74.066609. Epub 2006 Dec 21.
We introduce periodic photonic structures where the strength of diffraction can be managed in a very broad frequency range. We show how to design arrays of curved waveguides where light beams experience wavelength-independent normal, anomalous, or zero diffraction. Our results suggest opportunities for efficient self-collimation, focusing, and reshaping of beams produced by white-light and supercontinuum sources. We also predict a possibility of multicolor Talbot effect, which is not possible in free space or conventional photonic lattices.
我们引入了周期性光子结构，其中衍射强度可在非常宽的频率范围内进行调控。我们展示了如何设计弯曲波导阵列，使光束经历与波长无关的正常、反常或零衍射。我们的结果为白光和超连续谱源产生的光束的高效自准直、聚焦和重塑提供了机会。我们还预测了多色塔尔博特效应的可能性，这在自由空间或传统光子晶格中是不可能实现的。
