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首页> 外文期刊>IEEE Transactions on Nuclear Science >Significant Enhancement in Light Output of Photonic-Crystal-Based YAG:Ce Scintillator for Soft X-Ray Detectors
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Significant Enhancement in Light Output of Photonic-Crystal-Based YAG:Ce Scintillator for Soft X-Ray Detectors

机译：基于光子晶体的YAG：Ce闪烁体用于软X射线探测器的光输出显着增强

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Because of its high light output, Gd2O2 S:Tb (P43) phosphor powder is widely used in scintillator detectors for scanning transmission soft X-ray microscopy. However, the long decay time (1 ms) of P43 phosphor powder limits the image scanning speed. Inorganic scintillators such as YAG:Ce are very suitable for fast scanning imaging due to their short decay time (tens of nanoseconds). Nevertheless, its light output is lower than that of P43 phosphor powder. Patterning photonic crystals (PhCs) on the output surface of an inorganic scintillator is a simple and efficient method to enhance its light output. In this article, we use a soft X-ray interference lithography technique to produce a large-area pattern of nanoscale PhCs on a 200- $mu ext{m}$ -thickness and 1-in-diameter YAG:Ce scintillator. Measurement of the enhancement ratio was performed on the soft X-ray beamline (BL08U1A) at the Shanghai Synchrotron Radiation Facility. The results show that the light output of the PhC-patterned YAG:Ce scintillator with air coupling is approximately 2.8 times higher than that of the unpatterned YAG:Ce scintillator. Meanwhile, the time-resolved emission with optical excitation showed that the PhC structures did not affect the spontaneous emission rate in the internal of scintillator crystal. This enhancement of the light output indicates that the PhC-patterned YAG:Ce scintillator is a good candidate for soft X-ray detection.
机译：由于其高光输出，Gd2O2 S：Tb（P43）荧光粉被广泛用于闪烁探测器中，用于扫描透射X射线显微镜。但是，P43荧光粉的长衰减时间（1毫秒）限制了图像扫描速度。诸如YAG：Ce之类的无机闪烁体由于其短的衰减时间（数十纳秒），非常适合于快速扫描成像。然而，它的光输出低于P43荧光粉。在无机闪烁体的输出表面上对光子晶体（PhCs）进行构图是提高光输出的简单有效的方法。在本文中，我们使用软X射线干涉光刻技术在厚度为200-$ mu text {m} $且直径为1英寸的YAG：Ce闪烁体上产生大面积的纳米级PhC。增强比的测量是在上海同步辐射装置的软X射线束线（BL08U1A）上进行的。结果表明，具有空气耦合的PhC图案YAG：Ce闪烁体的光输出比未图案化的YAG：Ce闪烁体的光输出高约2.8倍。同时，利用光激发的时间分辨发射表明，PhC结构不影响闪烁体晶体内部的自发发射速率。光输出的这种增强表明PhC图案的YAG：Ce闪烁体是软X射线检测的良好候选者。

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    《IEEE Transactions on Nuclear Science》 |2019年第12期|2435-2439|共5页
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    Chinese Acad Sci Shanghai Inst Appl Phys Shanghai 201800 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China|Chinese Acad Sci Shanghai Adv Res Inst Shanghai Synchrotron Radiat Facil Shanghai 201204 Peoples R China;

    Chinese Acad Sci Shanghai Inst Appl Phys Shanghai 201800 Peoples R China|Chinese Acad Sci Shanghai Adv Res Inst Shanghai Synchrotron Radiat Facil Shanghai 201204 Peoples R China;

    Chinese Acad Sci Shanghai Adv Res Inst Shanghai Synchrotron Radiat Facil Shanghai 201204 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Phosphors; Silicon nitride; Azimuth; Phosphor powder; photonic crystals; scanning transmission soft X-ray microscopy (STXM); scintillation detectors;

    机译：荧光粉氮化硅;方位角荧光粉;光子晶体;扫描透射软X射线显微镜（STXM）;闪烁探测器;

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