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Phase Matching of SHG in Arbitrary Directions of biaxial crystals

Chinese Journal of Lasers 2002年第1期11卷 24-27页

作者： YANG Shengli CHEN Mouzhi (Phys. Dept. of Xiamen Univ., Xiamen 361005, China) Phys. Dept. of Xiamen Univ. Xiamen 361005

In this paper, propagation and polarization characteristics of optical waves in arbitrary directions in a biaxial crystal are analyzed, and universal relationships of refractive index dependence on their propagation directions and the principal refractive indices for two perpendicular polarization waves propagating in arbitrarily directions are derived from indicatrix equation. By using these relationships, methods of collinear phase matching (PM) of SHG are developed, and general expressions of the collinear PM angle dependent of the principal indices are given for SHG in arbitrarily directions. The expressions may be used to make optimization design of PM by computer for the SHG and to select optimum PM direction and to raise the SHG conversion efficiencies.

关键词： biaxial crystal second harmonic generation (SHG) collinear PM PM angle

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Optical anisotropy of black phosphorus by total internal reflection

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Nano Materials Science 2019年第4期1卷 304-309页

作者： Wei Xin Hao Bo Jiang Teng Qian Sun Xiao Guang Gao Shao Nan Chen Bo Zhao Jian Jun Yang Zhi Bo Liu Jian Guo Tian Chun Lei Guo The Guo China-U.S.Photonics Lab State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanicsand PhysicsChangchun130033China The Key Laboratory of Weak Light Nonlinear Photonics Ministry of EducationTeda Applied Physics InstituteAnd School of PhysicsNankai UniversityTianjin300071China The Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun130023China The Institute of Optics University of RochesterRochesterNY14627USA

Although abundant research on the anisotropy of van der Waals(vd W)materials has been published,we undertake an in-depth study of their optical properties as they have an important guiding role for light control in two-dimensional(2D)*** an example,we study the reflectance of few-layered black phosphorus(BP)in the total internal reflection(TIR)mode in *** demonstrate that its optical anisotropy can be changed on a large scale by varying the incident angles,polarization states,and the in-plane rotation angles of the BP *** analysis indicates that the phenomena observed are common to all the atom-thick biaxial crystals,so these conclusions can be widely applied to other anisotropic 2D *** research furthers the current understanding of the properties of BP more comprehensively,and provides guidance for developing new optoelectronic applications,especially when BP and other atom-thick biaxial crystals are integrated with TIR devices.

关键词： Black phosphorus Optical anisotropy Total internal reflection biaxial crystal

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