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Wave coupling theory of quadratic electro-optic effect and its applications |
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| Authors: | Dajun Liu He Wang Zhongxiang Zhou Hao Tian |
| Affiliation: | a Key Laboratory of Fundamental Science for National Defense of Aero and Ground Laser Communication Technology, Changchun University of Science and Technology, Changchun 130022, China b Department of Physics, Harbin Institute of Technology, Harbin 150001, China c College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China |
| Abstract: | Wave coupling theory of quadratic electro-optic effect is developed by considering the third-order nonlinearity as a perturbation in lossless nonmagnetic centrosymmetric medium. A general solution of the resultant equations is given to describe the quadratic electro-optic effect for the electromagnetic wave propagating along an arbitrary direction with applied external electric field. The effect of the polarization state on electro-optic coupling is studied in paraelectric phase KLTN crystals. A novel application of wave coupling theory of quadratic effect is described, namely polarization rotator, which can rotate the polarization of the electromagnetic wave with an arbitrary angle. |
| Keywords: | Quadratic electro-optic effect Electro-optic device KLTN |
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