NONMAGNETIC GARNET SINGLE CRYSTAL SUBSTRATE, BISMUTH SUBSTITUTION TYPE RARE EARTH IRON GARNET SINGL

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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 ScxGa5-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 NdyBi3-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