NONMAGNETIC GARNET SINGLE CRYSTAL SUBSTRATE, BISMUTH SUBSTITUTION TYPE RARE EARTH IRON GARNET SINGLE CRYSTAL FILM, AND METHOD FOR GROWING BISMUTH SUBSTITUTION TYPE RARE EARTH IRON GARNET SINGLE CRYSTAL FILM

摘要

PROBLEM TO BE SOLVED: To provide: a nonmagnetic garnet single crystal substrate capable of stably growing a bismuth substitution type rare earth iron garnet single crystal (RIG) film having an insertion loss of 0.30 dB or less when light having a waveband of 1 μm is incident; a RIG film grown on the nonmagnetic garnet single crystal substrate; and a method for growing the RIG film.;SOLUTION: The nonmagnetic garnet single crystal substrate is shown by the chemical formula of Sm₃ Sc_xGa_5-xO₁₂ (where, 1.73≤x≤1.75) and has a lattice constant of 1.26095-1.26105 nm. The RIG film is shown by the chemical formula of Nd_yBi_3-yFe₅O₁₂ (where, 1.95≤y≤2.05) and has an insertion loss of 0.30 dB or less when light having a wavelength of 1060 nm is incident in a film thickness causing a Faraday rotation angle of 45° to the light having a wavelength of 1060 nm.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT