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首页> 外文期刊>Physica status solidi, B. Basic research >Ultrafast optical nonlinearities in CdS nanocrystalline thin films prepared by chemical bath deposition
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Ultrafast optical nonlinearities in CdS nanocrystalline thin films prepared by chemical bath deposition

机译：化学浴沉积法制备的CdS纳米晶薄膜中的超快光学非线性

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The dynamics of absorption bleaching in CdS nanocrystalline thin films were studied in the temperature interval 10-300 It and three distinct decay time constants (sub-ps, ps, and ns) were identified. We interpreted the dynamics in terms of three groups of nanocrystals with specific defects and showed that two of them are related. A close link between the temperature behaviour of the photoluminescence efficiency and that of the relative amplitude of the nanosecond component was observed and an explanation based on a microscopical model was proposed. The optical nonlinearities were studied by self-diffraction technique. A dephasing time constant shorter than 80 fs and a value of /chi (3)/ approximate to 6 x 10(-16) m(2) V-2 were obtained. [References: 6]
机译：研究了CdS纳米晶薄膜在10-300℃温度区间的吸收漂白动力学，并确定了三个不同的衰减时间常数（sub-ps，ps和ns）。我们用具有特定缺陷的三组纳米晶体解释了动力学，并表明其中两个是相关的。观察到光致发光效率的温度行为与纳秒分量的相对幅度的温度行为之间的密切联系，并提出了基于微观模型的解释。通过自衍射技术研究了光学非线性。获得的移相时间常数短于80 fs，并且/ chi（3）/的值近似为6 x 10（-16）m（2）V-2。 [参考：6]

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