Out-of-plane scattering in photonic crystal slabs

被引:77
作者
Bogaerts, W [1 ]
Bienstman, P [1 ]
Taillaert, D [1 ]
Baets, R [1 ]
De Zutter, D [1 ]
机构
[1] State Univ Ghent, IMEC, Dept Informat Technol, B-9000 Ghent, Belgium
关键词
integrated optics; optical materials; optical planar waveguides; optical propagation in nonhomogeneous media; optical scattering;
D O I
10.1109/68.924021
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Photonic crystal slabs combine a slab waveguide with an in-plane photonic crystal. Light is then confined in-plane by the photonic crystal and out-of-plane by the slab waveguide. The etched structures will cause light to scatter out of the waveguide plane, We studied the out-of-plane scattering losses using a two-dimensional approximation of this three-dimensional structure, with etched slots instead of holes, Our simulation techniques include mode expansion with perfectly matched layer absorbing boundary conditions. We show that the losses increase with higher index contrast, but that with very high-index contrasts light can be coupled into lossless Bloch modes.
引用
收藏
页码:565 / 567
页数:3
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