AVS 65th International Symposium & Exhibition
    Surface Science Division Tuesday Sessions
       Session SS+HC+MI-TuA

Paper SS+HC+MI-TuA12
Giant Optical Anisotropy in Hexagonal Perovskite Chalcogenides with Quasi-1D Structures

Tuesday, October 23, 2018, 6:00 pm, Room 203C

Session: Oxides/Chalcogenides: Structures and Reactions
Presenter: Shanyuan Niu, University of Southern California
Authors: S. Niu, University of Southern California
G. Joe, University of Wisconsin - Madison
H. Zhao, University of Southern California
M. Mecklenburg, University of Southern California
T. Tiwald, J.A. Woollam Co. Inc
K. Mahalingam, Air Force Research Laboratory
H. Wang, University of Southern California
M. Kats, University of Wisconsin - Madison
J. Ravichandran, University of Southern California
Correspondent: Click to Email
Optical anisotropyis a crucial building block to engineer the polarization of light in polarizing optics, light modulators, imaging and communication systems. While metamaterial architectures with form birefringence can overcome the limited optical anisotropy available in widely used natural anisotropic crystals, their deployment is limited by the demanding fabrication. We demonstrate the realization of giant optical anisotropy via chemically engineering the polarizability tensor in a natural material, BaTiS3, which has a highly anisotropic quasi-1D structure and features easily accessible in-plane anisotropy. Large single crystals were grown with the chemical vapor transport method. We report the observation of a large, broadband infrared birefringence and linear dichroism. As-grown crystals demonstrate strong dichroism with two distinct optical absorption edges for light with polarizations along two principal axes. To our knowledge, the unprecedented birefringence in the transparent region is more than twice as large as that in any other bulk crystal.