Investigation of gyrotropic properties for Hg3X2Cl2 (X=Se, Te) crystals

This paper focuses on optical activity investigations of Hg3X2Cl2 (X = Se, Te) crystals. To understand better the nature of gyrotropy occurrence, relation to the crystal structure of Hg3X2Cl2 (X = Se, Te) crystals and contribution of interband transitions to optical rotation the detailed theoretical analysis is conducted. The gyration tensor of Hg3Se2Cl2 crystals is calculated. The theoretical results are confirmed by experimental observation of optical activity. Nanomaterials based on Hg3X2Y2 (X = S, Se, Te; Y = F, Cl, Br, I) gyrotropic crystals have tremendous potential in addressing the two major issues faced by our society: the searching for new energy sources and improving healthcare. Obtained data suggest that the phenomenon of optical activity should be taken into account in the studies concerning optical diagnostic methods in medicine.