Acta Optica Sinica, Volume. 41, Issue 6, 0619001(2021)
Research on Symmetry of BaTiO3 Film Based on Second-Harmonic Generation Technology
Optical second-harmonic generation technology is an important tool for studying the polarization characteristics and symmetry of materials. Second-harmonic generation test is carried out on BaTiO3 film samples grown on SrTiO3 substrates by using the built-up microscopic second-harmonic generation light path. The results show that BaTiO3 film has double rotational symmetry in the in-plane direction. The second-harmonic signal of the sample was measured in four polarization modes. The results show that with the change of the incident power of the fundamental frequency light, the second-harmonic intensity pattern also changed. When the incident light power is 7.5--7.7 mW, the signal changes suddenly; when the incident light power is greater than 7.5 mW, the main peak of the second-harmonic pattern of the horizontally polarized outgoing light pattern is weakened, and the secondary peak is strengthened.
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Yawen Guo, Yuan Li, ZongWei Ma. Research on Symmetry of BaTiO3 Film Based on Second-Harmonic Generation Technology[J]. Acta Optica Sinica, 2021, 41(6): 0619001
Category: Nonlinear Optics
Received: Aug. 31, 2020
Accepted: Nov. 2, 2020
Published Online: Apr. 7, 2021
The Author Email: Li Yuan (liyuan@hdu.edu.cn)