Two new nonlinear optical crystals: BaAl2B2O7 and K2Al2B2O7
Two new nonlinear optical crystals: BaAl2B2O7 and K2Al2B2O7
复制标题
DOI：
10.1117/12.318263
复制
发表时间：
1998-08
期刊：
影响因子：
--
通讯作者：
N. Ye;W. Zeng;Bai-chang Wu;Chuangtian Chen
中科院分区：
文献类型：
--
作者：
N. Ye;W. Zeng;Bai-chang Wu;Chuangtian Chen
采用顶部籽晶助熔剂法生长了BaAl_2B_2O_7和K_2Al_2B_2O_7两种新型非线性光学晶体。BaAl 2B 2 O 7在菱形空间群R32（Z等于3）中结晶，在尺寸a等于B等于5.001埃、c等于24.378埃和V等于528.01埃3的晶胞中。K2 Al 2B 2 O 7在三角空间群P321（Z = 3）中结晶，其晶胞尺寸为a = B = 8.530埃，c = 8.409埃，V = 529.9（2）埃3。理论计算和非线性光学效应的测量表明，两种晶体是相位匹配的，BaAl_2B_2O_7的非线性光学系数d11 = 0.75pm/V，K_2Al_2B_2O_7的d11 = 0.48pm/V。BaAl_2B_2O_7的双折射率为（Δ）n = 0.063，K_2Al_2B_2O_7的双折射率为0.068。
The new nonlinear optical crystals BaAl2B2O7 and K2Al2B2O7 are readily grown by top-seeded flux method. BaAl2B2O7 crystallizes in the rhombohedral space group R32 (Z equals 3) in a cell of dimensions a equals b equals 5.001 angstrom, c equals 24.378 angstrom and V equals 528.01 angstrom3. K2Al2B2O7 crystallizes in the trigonal space group P321 (Z equals 3) in a cell of dimensions a equals b equals 8.530 angstrom, c equals 8.409 angstrom and V equals 529.9(2)angstrom3. The theoretical calculations and the measurement of nonlinear optical effect indicates that the two crystals are phase-matchable with the nonlinear optical coefficient d11 equals 0.75 pm/V for BaAl2B2O7 and d11 equals 0.48 pm/V for K2Al2B2O7. The birefringence of BaAl2B2O7 is (Delta) n equals 0.063 and 0.068 for K2Al2B2O7.