| abstract |
(57) [Problem] To provide a circular polarization filter, a sensor, and the like that can be miniaturized and have no error due to manufacturing accuracy. SOLUTION: A crystal of a rare earth complex having a circular polarization property, in which a central ion is a rare earth ion and a diastereomer structural ligand is coordinated to the rare earth ion, such as Eu (hfa-D) 3 BINAPO complex, or the like. A circularly polarized light filter, a sensor, and the like are manufactured using an optical functional material such as a solid carrier containing. |