Development of new nonlinear optical crystal KィイD22ィエD2AlィイD22ィエD2BィイD22ィエD2OィイD27ィエD2 for vacuum ultra-violet light generation

真空紫外光发生用新型非线性光学晶体KD22D2AlD22D2BD22D2OD27D2的开发

• 批准号: 10450009
• 负责人: SASAKI Takatomo
• 金额: $ 8.45万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450009/
• 关键词: KAB; vacuum ultra-violet; frequency conversion; nonlinear optical borate crystal; birefringence; crystal growth; transmittance spectrum; flux growth; ポレート系非線形光学結晶

The results obtained in this research are summarized as followings.A new nonlinear optical borate crystal KィイD22ィエD2AlィイD22ィエD2BィイD22ィエD2OィイD27ィエD2 was developed as an ultraviolet light generator. The structure has been established by 4-axis X-ray diffraction methods. The material crystallizes in the trigonal space group P321 with a=8.5657 (9) Å and c=8.463 (2) Å. KAB possesses space arrangement similar to SrィイD22ィエD2BeィイD22ィエD2BィイD22ィエD2OィイD27ィエD2 (SBBO) which has toxic Be atom. By using the Top-Seeded Solution Growth (TSSG) method, a bulky KAB crystal with a dimensions of 4×3×2 mmィイD13ィエD1 was grown from KィイD22ィエD2COィイD23ィエD2-BィイD22ィエD2OィイD23ィエD2-NaF flux. The KィイD22ィエD2COィイD23ィエD2 and BィイD22ィエD2OィイD23ィエD2 compounds decrease the viscosity of the solution to about 1200 cP. The refractive indices at 589 nm are nィイD20ィエD2=1.553 and nィイD20ィエD2=1.479 with birefringence Δn=0.074. The absorption edge is down to about 180nm. The effective nonlinear coefficient is similar to that of KDP (dィイD236ィエD2=0.37pm/V), as obtained from the powder test. Type-I phase-matching angle for second-harmonic generation of Nd : YAG laser was found to be θ=28°. These optical properties, moderate nonlinearity and birefringence, and a wide transparent range in the UV, show that KAB is a good candidate for frequency mixing into the UV light.

主要研究结果如下：1.合成了一种新型的硼酸盐非线性光学晶体K_（22）Al_（通过四轴X射线衍射方法确定了结构。晶体属三角晶系，空间群P321，a=8.5657（9）<$，c=8.463（2）<$。KAB的空间排列类似于含有毒Be原子的Sr_（22）O_（27）O_（2采用顶部籽晶溶液生长法（TSSG），以K_（22）O_（23）O_（K化合物D22取代D2CO取代D23取代D2和B取代D22取代D2 O取代D23取代D2化合物将溶液的粘度降低至约1200 cP。在589 nm处的折射率为n =1.553和n =1.479，双折射率Δn=0.074。吸收边下降到约180 nm。由粉末测试得到的有效非线性系数与KDP的近似（d_（236））D_（236）=0.37pm/V）。获得了Nd：YAG激光倍频的第一类相位匹配角θ=28°。这些光学性质，适度的非线性和双折射，以及在UV中的宽的透明范围，表明KAB是用于频率混合到UV光中的良好候选者。

项目成果

森勇介他: "新しい紫外用非線形光学結晶"OPTRONICS. 217. 99-102 (2000)

Yusuke Mori 等人：“新型紫外非线性光学晶体” OPTRONICS. 217. 99-102 (2000)

Y.Mori et al.: "A New Nonlinear Optical Borae Crystal KAB" Japanese Journal of Applied Physics. 37. L1093-L1094 (1998)

Y.Mori 等人：“一种新的非线性光学 Borae 晶体 KAB”，日本应用物理学杂志。

Y. Mori et al.: "K_2Al_2B_2O_7 - A New Nonlinear Optical Crystal"Proceedings of SPIE. 3556. 156-161 (1998)

Y. Mori 等人：“K_2Al_2B_2O_7 - 一种新型非线性光学晶体”SPIE 会议录。

Y. Mori et al.: "Redetermination of the crystal structure of dipotassium dialuminum borate, K_2Al_2B_2O_7, a new nonlinear optical material"Z. Kristallogr. New Crystal Structure. 214. 433-434 (1999)

Y. Mori等：“新型非线性光学材料硼酸二钾铝K_2Al_2B_2O_7晶体结构的重新测定”Z.

Zhang-Gui HU, Tetsuji HIGASHIYAMA, Masashi YOSHIMURA, Yoke Khin YAP, Yusuke MORI and Takatomo SASAKI: "A New Nonlinear Optical Borate Crystal KィイD22ィエD2AlィイD22ィエD2BィイD22ィエD2OィイD27ィエD2 (KAB)"Japanese Journal of Applied Physics. Vol.37, No.10A. L1093-L1094

张贵胡、Tetsuji HIGASHIYAMA、Masashi YOSHIMURA、Yoke Khin YAP、Yusuke MORI 和 Takatomo SASAKI：“一种新型非线性光学硼酸盐晶体 Key D22 D2 Al D22 D2 B D22 D2 O D27 D2 (KAB)”日本应用物理学杂志。第 37 卷，第 10A 号。