期刊
JOURNAL OF OPTICS
卷 16, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/16/1/015706
关键词
waveguide arrays; diffraction-free propagation; image transmission; flat band systems
类别
资金
- FONDECYT [1110142]
- Programa ICM [P10-030-F]
- Programa de Financiamiento Basal de CONICYT [FB0824/2008]
We study the propagation of non-diffracting images in kagome photonic lattices. In a weak-coupling regime (discrete approach), the linear spectrum is composed by only three bands, including a completely degenerated and flat one. The states forming this special band are well localized in space and constitute building blocks for this lattice. By linearly combining these non-diffractive fundamental modes, different shapes can be composed and, therefore, a given image will propagate without distortion. As an example, we compare the linear propagation of a particular image for kagome and rectangular lattices. At the end, we test our concept by performing numerical simulations in a continuous kagome potential.
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