| abstract |
(57) [Problem] To provide a low-loss and small-sized waveguide using a three-dimensional photonic crystal. SOLUTION: A plurality of linear bodies have a stripe-like layer which is periodically arranged in parallel with each other at a constant pitch, and a plurality of these layers are laminated, and a linear body in an n-th layer from one side is formed. the linear body in the (n + 1) th layer is orthogonal, The linear body in the n-th layer and the linear body in the (n + 2) th layer from one side are parallel, and the arrangement of the linear bodies in the n-th layer is changed to the arrangement of the linear bodies in the (n + 2) th layer. On the other hand, at least one layer of the photonic crystal having a photonic crystal shifted by half of the predetermined pitch and not being located at one end of one or the other of the photonic crystal has at least one linear element. A photonic crystal waveguide in which at least a part is missing to form a linear defect, and the linear defect functions as a waveguide. |