It is shown that long-lived photoinduced dichroism in garnets is caused by photoproduced charges with anisotropic structure, keeping long memory of the pumping light polarization, while photoinduced absorption is due to all photoproduced charges irrespective of their intrinsic structure. The charges with anisotropic structure are identified as two-center oxygen holes. The formation of an oxygen hole is preceded by the excitation of a charge-transfer state with electron partially transferred to a cation C (<$E roman V sup 5+> for NaCa2Mn2V3O12 garnet) from an adjacent oxygen anion. To turn this excited state into a free hole state requires some time <$E tau sub roman hole> during which the hole axis can be reoriented resulting in a diminution of dichroism. The time <$E tau sub roman hole> shortens with increasing ionization potential of the cation С (very high for <$E roman V sup 5+>). Such a mechanism explains qualitatively a set of unusual experimental facts, in particular, a very strong dichroism observed just in the NaCa2Mn2V3O12 garnet, where photoinduced changes of all optical properties disappear after switching off the irradiation significantly faster than those in other garnets examined.

• Єременко Віктор Валентинович (1932–2017) (фізико-математичні науки)
• Гнатченко Сергій Леонідович (1947–2020) (фізико-математичні науки)
• Качур Іван Сергійович (1946–) (фізико-математичні науки)

  Якщо, ви не знайшли інформацію про автора(ів) публікації, маєте бажання виправити або відобразити більш докладну інформацію про науковців України запрошуємо заповнити "Анкету науковця"