Kawashima Shoichi, Ishizaki Kenji, Noda Susumu
Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan.
Opt Express. 2010 Jan 4;18(1):386-92. doi: 10.1364/OE.18.000386.
We demonstrate the operation of two types of waveguides formed in three-dimensional (3D) photonic crystals (PCs). We first created a vertical waveguide by stacking acceptor-type defects, in which near-infrared light propagates in the stacking direction. Light is transmitted independent of polarization in this waveguide because electromagnetic waves couple to a degenerate mode derived from the structural symmetry of the defects. We then connected horizontal and vertical waveguides to form an L-shaped waveguide, which is able to guide near-infrared light from the horizontal to vertical direction in the 3D PC. We envisage the realization of more complex 3D optical interconnections by optimizing the waveguide structures and increasing the PC period in the vertical direction.
我们展示了在三维（3D）光子晶体（PC）中形成的两种类型波导的运作情况。我们首先通过堆叠受主型缺陷创建了一个垂直波导，近红外光在该堆叠方向上传播。在这个波导中，光的传输与偏振无关，因为电磁波耦合到由缺陷的结构对称性衍生出的简并模式。然后，我们连接水平和垂直波导以形成一个L形波导，它能够在3D PC中将近红外光从水平方向引导到垂直方向。我们设想通过优化波导结构并增加垂直方向上的PC周期来实现更复杂的3D光学互连。
