| Li2B4O7晶体的晶格振动光谱 |
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| 引用本文： | 曾令之,蒋毅坚,傅易,周亚栋. Li2B4O7晶体的晶格振动光谱[J]. 物理学报, 1993, 42(1): 154-160 |
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| 作者姓名： | 曾令之 蒋毅坚 傅易 周亚栋 |
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| 作者单位： | 北京工业大学应用物理系,北京100022 |
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| 摘 要： | 在室温下测量了Li2B4O7单晶的各种振动类的偏振Raman散射谱和该晶体粉末样品的红外吸收谱(200—4000cm-1)。根据LO-TO劈裂的实验结果,计算出该晶体极化模的有效电荷和振子强度。通过与BBO和LBO晶体的结构和B—O伸缩振动模频率比较,得出:Li2B4O7晶体可能有较大的非线性光学系数。关键词：
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| 关 键 词： | 硼酸盐 振动谱 有效电荷 振子强度 |
| 收稿时间： | 1992-02-25 |
VIBRATIONAL SPECRTA OF SINGLE CRYSTAL Li2B4O7 |
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| ZENG LING-ZHI,JIANG YI-JIAN,FU YI and ZHOU YA-DONG. VIBRATIONAL SPECRTA OF SINGLE CRYSTAL Li2B4O7[J]. Acta Physica Sinica, 1993, 42(1): 154-160 |
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| Authors: | ZENG LING-ZHI JIANG YI-JIAN FU YI ZHOU YA-DONG |
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| Abstract: | Polarized Raman spectra of single crystal Li2B4O7 have been measured in the wavenum-ber shift range of 50-3000cm-1 at room temperature. The infrared absorption spectrum of Li2B4O7 has also been measured in the range of 200-4000cm-1 for powder samples dispersed in the pressed KBr disks. Based upon the experimental results of LO-TO splitting, the effective charge and mode strength of polar modes are calculated. A comparison of the structure and B-O stretching vibration frequency of various borate species suggests comparatively high nonlinear optical efficiency of Li2B4O7 crystals. |
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