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多晶金刚石窗口材料的双光子激发

Two-Photon Excitation of Polycrystalline Diamond Window Material

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摘要

在超短脉冲抽运光作用下,利用双光子激发研究了多晶金刚石非线性吸收和非线性折射的动力学演化过程。在非线性吸收动力学实验中,观察到了金刚石样品中被激发载流子的两个不同的复合过程,时间尺度分别在百皮秒量级和纳秒量级,精确得到了不同抽运光能量作用时两个过程各自的时间常数。在非线性折射动力学实验中,观察到了金刚石样品中由非简并双光子吸收过程所引起的正的非线性折射率变化,得到了样品的三阶非线性系数。

Abstract

Under the action of ultrashort-pulse pump light, the dynamical evolution processes of nonlinear absorption and nonlinear refraction of polycrystalline diamond are studied by using two-photon excitation. In the dynamic experiment of nonlinear absorption, two different recombining processes of activated carriers are observed in the diamond sample, whose time scales are hundreds of picosecond scale and nanosecond scale, respectively, and the time constant of each process under the action of pump light with different energies is obtained accurately. In the dynamic experiment of nonlinear refraction, the positive change of nonlinear refractive index induced by the nondegenerate two-photon absorption process is observed and the third order nonlinear coefficient of the sample is obtained.

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中图分类号:O437

DOI:10.3788/aos201737.0419001

所属栏目:非线性光学

基金项目:国家自然科学基金(11575166)

收稿日期:2016-11-16

修改稿日期:2016-12-27

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作者单位    点击查看

张奔:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
刘慎业:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
刘祥明:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
彭晓世:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900

联系人作者:张奔(ben_ustc@163.com)

备注:张奔(1993-),男,硕士研究生,主要从事超快非线性光学方面的研究。

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引用该论文

Zhang Ben,Liu Shenye,Liu Xiangming,Peng Xiaoshi. Two-Photon Excitation of Polycrystalline Diamond Window Material[J]. Acta Optica Sinica, 2017, 37(4): 0419001

张奔,刘慎业,刘祥明,彭晓世. 多晶金刚石窗口材料的双光子激发[J]. 光学学报, 2017, 37(4): 0419001

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