supported by the National Natural Science Foundation of China(21833010,22193042,22125110,21921001,22122507,61975207,and U21A2069);the Youth Innovation Promotion of Chinese Academy of Sciences(Y202069);the Natural Science Foundation of Fujian Province(2021J01523 and2022J02012);the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-SLH024);Fujian Institute of Innovation in Chinese Academy of Sciences(FJCXY18010201);Young Talent Supporting Project of Fujian Association of Science and Technology(2021000008);the National Postdoctoral Program for Innovative Talents(BX2021315);the National Key Research and Development Program of China(2019YFA0210402).
Birefringence arises when the propagation speed and refractive index of light in an optically anisotropic crystal changes in response to the direction of vibration.Thus,birefringence belongs to linear optical anisotro...