Preparation of two-dimensional magneto-photonic crystals of bismus substitute yttrium iron garnet materials

Porous alumina, which is obtained by anodization of aluminium, has self-ordered pore array. Recently, this ordered pore array structure has been discussed from the viewpoint of the application to two-dimensional photonic crystals (2D-MPC). We prepared porous alumina templates with a pore diameter of 60 nm and thickness of 2 μm. By using these templates as mask, the Bi:YIG film deposited by RF-magnetron sputtering were etched by an Ar ion gun. We were able to fabricate 2D-MPC of Bi:YIG with hole structure.