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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Enhancement of the optical Kerr effect by photobleaching in nanostructured indium-doped zinc oxide thin films
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Enhancement of the optical Kerr effect by photobleaching in nanostructured indium-doped zinc oxide thin films

机译：通过光漂白在纳米结构的铟掺杂氧化锌薄膜中增强光学克尔效应

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摘要

A modification of the nonlinear refractive index exhibited by indium-doped zinc oxide thin solid films deposited by an ultrasonic spray pyrolysis technique, after strong femtosecond laser irradiation, is presented. We used a standard time-resolved optical Kerr gate configuration with 80fs pulses at 830nm in order to study the third-order optical nonlinearities of the samples. A significant enhancement of the optical Kerr response was obtained by intense femtosecond excitation, which induced a permanent bleaching in the sample. A quasi-instantaneous pure electronic nonlinearity without the contribution of nonlinear optical absorption was observed. There is a close relationship between the change in linear absorption induced in the indium-doped zinc oxide film after high-intensity irradiation and the strong third-order nonlinearity that develops in the irradiated film.
机译：提出了在强飞秒激光辐照后通过超声喷涂热解技术沉积的铟掺杂的氧化锌薄膜固态膜所表现出的非线性折射率的修正。为了研究样品的三阶光学非线性，我们使用了标准的时间分辨光学克尔门配置，在830nm处有80fs的脉冲。飞秒激发引起强烈的光学Kerr响应显着增强，这引起了样品中的永久性漂白。观察到准瞬时纯电子非线性，没有非线性光学吸收的影响。高强度辐照后，掺铟氧化锌薄膜中引起的线性吸收变化与被辐照薄膜中形成的强三阶非线性之间存在密切关系。

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