Opt Lett. 2022 Apr 1;47(7):1875-1878. doi: 10.1364/OL.452984.
We report and experimentally demonstrate a novel, to the best of our knowledge, sensitive and wideband optical detection strategy based on the light-induced thermoelastic effect in a miniature quartz tuning fork (mQTF) with low stiffness prongs. Compared with a traditional QTF, the soft prongs of the mQTF result in improved sensitivity. Experimental results demonstrate that the mQTF exhibits ∼54-fold superior sensitivity compared to a QTF, and the mQTF sensor has an ultra-broadband optical response, ranging from visible light to terahertz wavelengths. Its response time reaches 11.7 ms, and the minimum noise equivalent power (NEP) is measured to be 2.2 × 10 W Hz at room temperature. The mQTF exhibits advantages in its cost-effectiveness, sensitivity, and ultra-broadband response, and provides a promising approach for the detection of low-dose optical and terahertz-wave radiation.
我们报告并实验证明了一种新颖的、据我们所知的基于在微型音叉（mQTF）中光致热弹性效应的灵敏且宽带的光学检测策略，该微型音叉具有低硬度叉臂。与传统的 QTF 相比，mQTF 的软叉臂提高了灵敏度。实验结果表明，mQTF 的灵敏度比 QTF 高约 54 倍，并且 mQTF 传感器具有超宽带的光学响应，从可见光到太赫兹波长。其响应时间达到 11.7ms，在室温下最小噪声等效功率（NEP）测量值为 2.2×10 W Hz。mQTF 在成本效益、灵敏度和超宽带响应方面具有优势，为低剂量光学和太赫兹波辐射的检测提供了一种很有前途的方法。
