This article reported about the ultraviolet (UV) radiation effect on the resonance frequency response of a AT-cut piezoelectric quartz crystal. A large resonance frequency upshift was observed when the quartz crystal was irradiated by UV light of 355-nm wavelength using a Q-switched pulsed Nd:YVO4 UV laser. The dynamic frequency response behavior was systematically investigated by illuminating the quartz crystal with UV light in which the UV intensity was varied with time in staircase- and linear pulse-shaped patterns. From the experimental analysis, we measured the limit of detection and the sensitivity of the quartz crystal, which are about 0.5 mW/cm ² and 0.706 Hz/(mW/cm ² ), respectively. For a constant UV irradiation, a moderate response (<10 s) and recovery (<10 s) times were achieved during the on and off cycles of the UV light. The short-term repeatability and maximum operating limit of AT-cut quartz crystal were also further studied upon exposure to UV light with different intensities. In this work, we not only demonstrate the impact of UV irradiation on quartz crystal but also discuss the mechanism of upshift in resonance frequency upon exposure to UV light. This study shows the applicability of quartz crystal for the detection of UV light.

中文翻译：

---

压电石英晶体共振频率的紫外光检测

本文报道了紫外线（UV）辐射对AT切割压电石英晶体共振频率响应的影响。当使用调Q脉冲Nd：YVO4紫外激光器用355nm波长的紫外光照射石英晶体时，观察到较大的共振频率上移。通过用紫外光照射石英晶体来系统地研究动态频率响应行为，其中紫外强度随时间呈阶梯形和线性脉冲形变化。通过实验分析，我们测量了检出限和石英晶体的灵敏度，分别为0.5 mW / cm ²和0.706 Hz /（mW / cm ² ）， 分别。对于恒定的UV照射，在UV光的打开和关闭周期中，获得了中等的响应时间（<10 s）和恢复时间（<10 s）。在不同强度的紫外线下，还进一步研究了AT切割石英晶体的短期可重复性和最大工作极限。在这项工作中，我们不仅演示了紫外线辐射对石英晶体的影响，而且还讨论了暴露于紫外线下时共振频率上移的机制。这项研究表明了石英晶体在检测紫外线方面的适用性。