基于c位掺杂的钇铁石榴石单晶生长与磁光性能优化研究进展OA

Yttrium iron garnet(Y3Fe5O12,YIG)has emerged as a highly promising functional material for next-generation optical isolators,magneto-optical switches,and integrated photonic devices,owing to its excellent optical transparency,strong Faraday rotation,low optical absorption loss,and high Curie temperature in the near-to mid-infrared spectral region.The rapid advancement of 5G/6G optical communications,fiber-optic gyroscopes,and quantum computing imposes increasingly stringent demands for high-performance,low-power magneto-optical devices,which in turn require YIG single crystals to combine a large magneto-optical response with low insertion loss and robust temperature stability.However,the incongruent melting behavior of YIG precludes the growth of high-quality single crystals by conventional Czochralski pulling,making the flux method the critical technological route for YIG crystal fabrication.This review provides a systematic overview of the evolution of flux-based growth techniques for YIG single crystals,with emphasis on the selective occupation mechanisms at the dodecahedral c-site and the associated charge-compensation principles of Bi3+and representative rare-earth ions such as Tb3+,Ce3+,Gd3+,and Dy3+.From the perspective of the microscopic origins of the magneto-optical effect,the incorporation of these ions enhances the Faraday rotation predominantly by strengthening spin-orbit coupling,introducing new 4f-5d transition channels,or modifying the super-exchange interactions among the Fe3+sublattices.Building on these fundamentals,this review further discusses the strategies for tailoring the magneto-optical performance in the near-to mid-infrared region and for optimizing temperature stability through ion doping.Current technical challenges,including doping homogeneity,crystal defect control,and broadband magneto-optical response,are analyzed,and future directions toward integrated-photonics-oriented magneto-optical single crystals are outlined.