β-BaB2O4 with special cut-angle applied to single crystal cascaded third-harmonic generation Project supported by the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2017MF031 and ZR2018BF029). |
(color online) Variation of (deff, I)2(deff, II)4 with the ϕ angle of BBO crystal. |