OPTICAL-CONSTANTS OF TBFEO3 MEASURED BY THE IMMERSION ELLIPSOMETRY METHOD AT WAVELENGTH 0.63 MU-M

To obtain main refractive indices of absorbing orthorhombic crystal Tb FeO3 by measurement on a single crystal face, the method of immersion ellipsometry was applied. It allows the restoration of the full 2 x 2 reflection matrix of anisotropic media. An analytical solution of the inverse ellipsometric problem is obtained for orthorhombic crystals, a nd main refractive indices of TbFeO3 are determined at a wavelength of 0.63 mu m.