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Rational structural design of benzothiazolium-based crystal HDB-T with high nonlinearity and efficient terahertz-wave generation
- Shi, Jingkai, Liang, Fei, He, Yixin, Zhang, Xinyuan, Lin, Zheshuai, Xu, Degang, Hu, Zhanggui, Yao, Jianquan, Wu, Yicheng
- Chemical communications 2019 v.55 no.55 pp. 7950-7953
- cations, chemical compounds, chemical reactions
- A new promising nonlinear optical crystal C₂₅H₂₅NO₄S₂ (HDB-T, P2₁ space group) exhibits significant macroscopic second-order optical nonlinearity about 1.5 times larger than that of the benchmark OH1 crystal benefiting from optimized orientated polar HDB cations. Widely tunable monochromatic terahertz-wave from 0.1 to 20 THz in the HDB-T crystal was realized for the first time.