Linear Dichroism Conversion in Quasi‐1D Perovskite Chalcogenide
Abstract
Anisotropic photonic materials with linear dichroism are crucial components in many sensing, imaging, and communication applications. Such materials play an important role as polarizers, filters, and waveplates in photonic devices and circuits. Conventional crystalline materials with optical anisotropy typically show unidirectional linear dichroism over a broad wavelength range. The linear dichroism conversion phenomenon has not been observed in crystalline materials. The investigation of the unique linear dichroism conversion phenomenon in quasi‐1D hexagonal perovskite chalcogenide BaTiS3 is reported. This material shows a record level of optical anisotropy within the visible wavelength range. In contrast to conventional anisotropic optical materials, the linear dichroism polarity in BaTiS3 makes an orthogonal change at an optical wavelength corresponding to the photon energy of 1.78 eV. First‐principles calculations reveal that this anomalous linear dichroism conversion behavior originates from the different selection rules of the parallel energy bands in the BaTiS3 material. Wavelength‐dependent polarized Raman spectroscopy further confirms this phenomenon. Such a material, with linear dichroism conversion properties, could facilitate the sensing and control of the energy and polarization of light, and lead to novel photonic devices such as polarization‐wavelength selective detectors and lasers for multispectral imaging, sensing, and optical communication applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 25, 2019
- Source ID
- 10.1002/adma.201902118
Entities
People
- Fanxin Liu
- Han Wang
- Huan Zhao
- Jayakanth Ravichandran
- Jiangbin Wu
- Ping‐heng Tan
- Shanyuan Niu
- Xin Cong
- Zhonghao Du
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Chinese Academy of Sciences
- National Natural Science Foundation of China
- National Science Foundation
- Program 973
- University of Chinese Academy of Sciences
- University of Southern California
- Zhejiang University of Technology