Khodamohammadi Amir, Khoshsima Habib, Fallahi Vahid, Sahrai Mostafa
Appl Opt. 2015 Feb 10;54(5):1002-9. doi: 10.1364/AO.54.001002.
A new type of wideband slow light with a large delay bandwidth product in a slab photonic crystal waveguide with a triangular lattice of circular air holes in a silicon-on-insulator substrate based on optofluidic infiltration is demonstrated. It is shown that dispersion engineering through infiltrating optical fluids-with different refractive indices n(1f) and n(2f)--in the first two rows of the air holes innermost to the waveguide results in an improved normalized delay bandwidth product ranging from 0.187 to 0.377 with large bandwidth (12 nm<Δλ<32 nm) and group index (14.20< n(g)< 24.62) around 1550 nm. The nearly zero group velocity dispersion on the order of 10-(20) s(2)/m is achieved in all of the structures. These results are obtained by numerical simulation based on a three-dimensional-plane-wave expansion method.
基于光流体浸润技术，在绝缘体上硅衬底上具有圆形气孔三角晶格的平板光子晶体波导中，展示了一种新型宽带慢光，其具有大延迟带宽积。结果表明，通过在波导最内层的前两排气孔中浸润具有不同折射率n(1f)和n(2f)的光学流体来进行色散工程，可使归一化延迟带宽积在1550nm附近得到改善，范围从0.187到0.377，带宽较大（12nm <Δλ< 32nm）且群折射率（14.20 < n(g)< 24.62）。在所有结构中均实现了约10-(20) s(2)/m量级的近零群速度色散。这些结果是通过基于三维平面波展开法的数值模拟获得的。
