| 分子内质子转移分子2-(2′-羟基苯基)间氮杂氧茚的光学非线性的研究 |
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| 引用本文： | 尚小明,汤国庆,张桂兰,陈文驹,杨斌洲,张小秋.分子内质子转移分子2-(2′-羟基苯基)间氮杂氧茚的光学非线性的研究[J].光学学报,1997,17(5):526-532. |
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| 作者姓名： | 尚小明 汤国庆 张桂兰 陈文驹 杨斌洲 张小秋 |
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| 作者单位： | 南开大学现代光学研究所，中国科学院西安光学精密机械研究所瞬态光学技术实验室 |
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| 基金项目： | 国家科委攀登计划项目,中科院西安光机所瞬态光学技术实验室资助 |
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| 摘 要： | 报道了在调Ｑ的Ｎｄ∶ＹＡＧ激光器泵浦下用Ｚ扫描技术对具有分子内质子转移（ＥＳＩＰＴ）特性的分子２（２′羟基苯基）间氮杂氧茚（ＨＢＯ）的光学非线性的研究。结果表明：对１．０６μｍ的光，ＨＢＯ无非线性吸收，其三阶非线性极化率不随入射光强而变；而在０．５３μｍ的激光作用下，ＨＢＯ表现出显著的双光子吸收，其双光子吸收系数随泵浦光强增强而减小，而其三阶非线性极化率实部则随泵浦光强的增强而增大。在建立双光子泵浦产生激发态分子内质子转移动态模型的基础上，通过理论计算很好地解释了实验现象
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| 关 键 词： | 2-（2′-羟基苯基）间氮杂氧茚，激发态分子内质子转移，非线性光学 |
| 收稿时间： | 1996/1/1 |
Optical Nonlinearities of 2-(2′-Hydroxyphenyl)benzoxazole Based on Excited State Proton Transfer |
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| Shang Xiaoming,Tang Guoqing,Zhang Guilan,Chen Wenju.Optical Nonlinearities of 2-(2′-Hydroxyphenyl)benzoxazole Based on Excited State Proton Transfer[J].Acta Optica Sinica,1997,17(5):526-532. |
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| Authors: | Shang Xiaoming Tang Guoqing Zhang Guilan Chen Wenju |
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| Abstract: | The studies of optical nonlinearities of 2-(2′-hydroxyphenyl)benzoxazole(HBO), based on excited state intramolecular proton transfer in cyclohexane solution using Z-scan technique are reported. The results show that: (1) At 1.06 μm, HBO has no nonlinear absorption. And its real part of third order nonlinear susceptibility, χ(3)R is not dependent on the pumping intensity I0; (2) with the irradiation at 0.53 μm, HBO exhibits evident two photon absorption (TPA). Its TPA coefficient decreases with increasing I0, while its χ(3)R increases with increasing pumping intensity I0. By establishing the ESIPT kinetic model of HBO based on TPA, we can explain the experiment satisfactorily. |
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| Keywords: | ? hydroxyphenyl)benzoxazole excited state intramolecular proton transfer nonlinear optics |
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