赵康, 耿蕊, 杨明庆, 陈青山. 胶质红外量子点薄膜入射角对荧光特性的影响分析[J]. 应用光学, 2020, 41(5): 1082-1088. DOI: 10.5768/JAO202041.0506003
引用本文: 赵康, 耿蕊, 杨明庆, 陈青山. 胶质红外量子点薄膜入射角对荧光特性的影响分析[J]. 应用光学, 2020, 41(5): 1082-1088. DOI: 10.5768/JAO202041.0506003
ZHAO Kang, GENG Rui, YANG Mingqing, CHEN Qingshan. Effect of incidence angle on fluorescence properties of colloidal infrared quantum dots thin film[J]. Journal of Applied Optics, 2020, 41(5): 1082-1088. DOI: 10.5768/JAO202041.0506003
Citation: ZHAO Kang, GENG Rui, YANG Mingqing, CHEN Qingshan. Effect of incidence angle on fluorescence properties of colloidal infrared quantum dots thin film[J]. Journal of Applied Optics, 2020, 41(5): 1082-1088. DOI: 10.5768/JAO202041.0506003

胶质红外量子点薄膜入射角对荧光特性的影响分析

Effect of incidence angle on fluorescence properties of colloidal infrared quantum dots thin film

  • 摘要: 胶质红外量子点优异的光学性能使其荧光特性具有广泛的应用前景,在实际应用中通常需要封装成薄膜形态以保持稳定的荧光特性。然而,分散形式的改变可能会导致量子点荧光效率降低以及荧光角度特性变化。因此,建立了红外量子点荧光强度探测系统,对胶质红外量子点薄膜在不同角度激发光入射时产生的荧光分布情况进行研究。实验及分析结果表明,激发光与样品表面夹角大小在10°~170°之间的较大范围内入射时,在反射及透射荧光区域均可探测到荧光峰值强度70%~80%以上的荧光出射,在这一范围内的反射荧光与透射荧光强度差异和荧光强度随激发光入射角度的变化规律分别与样品中量子点的浓度以及分布形态有关。同时,随着入射激光能量的增强,样品出射荧光强度对于入射角度变化的“平坦”范围进一步扩大。

     

    Abstract: The excellent optical properties of colloidal infrared quantum dots make their fluorescence characteristics have a wide application prospect. In practical applications, the colloidal infrared quantum dots usually need to be packaged into the form of thin film to maintain the stable fluorescence characteristics. However, the change of the dispersed form of quantum dots may lead to reduction of the fluorescence efficiency and change of the fluorescence angle characteristics. Thus, the detection system for infrared quantum dots fluorescence intensity was established to study the fluorescence distribution of colloidal infrared quantum dots thin film under excitation light incident in different angles. The experimental results show that when the angle between the excitation light and the sample surface is within a large range of 10°~170°, the fluorescence emergence with fluorescence peak intensity of 70%~80% can be detected in both reflected and transmitted fluorescence regions. The intensity difference between reflected fluorescence and transmitted fluorescence in this range, as well as the change law of fluorescence intensity varies with the excitation light incident angle are related to the concentration and distribution form of quantum dots in the samples, respectively. In addition, with the enhancement of the incident laser energy, the flat range of the sample emergence fluorescence intensity to the change of incident angle is further expanded.

     

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