Pohlkötter Andreas, Willer Ulrike, Bauer Christoph, Schade Wolfgang
LaserApplicationCenter, Clausthal University of Technology, Am Stollen 19/Haus 3, 38640 Goslar, Germany.
Appl Opt. 2009 Feb 1;48(4):B119-25. doi: 10.1364/ao.48.00b119.
A mechanical quartz microresonator (tuning fork) is used to detect electromagnetic radiation. The detection scheme is based on forces created due to the incident electromagnetic radiation on the piezoelectric tuning fork. A force can be created due to the transfer of the photon momentum of the incident electromagnetic radiation. If the surfaces of the tuning fork are nonuniformly heated, a second force acts on it, the so-called photophoretic force. These processes occur for all wavelengths of the incident radiation, making the detector suitable for sensing of ultraviolet, visible, and mid-infrared light, even THz-radiation. Here the detector is characterized in the visible range; noise analysis is performed for 650 nm and 5.26 microm. A linear power characteristic and the dependence on pulse lengths of the incoming light are shown. Examples for applications for the visible and mid-infrared spectral region are given by 2f and absorption spectroscopy of oxygen and nitric oxide, respectively.
一种机械石英微谐振器（音叉）用于检测电磁辐射。该检测方案基于入射电磁辐射作用于压电音叉时产生的力。由于入射电磁辐射的光子动量传递，可产生一个力。如果音叉表面受热不均匀，会有第二个力作用于其上，即所谓的光泳力。这些过程在入射辐射的所有波长下都会发生，使得该探测器适用于检测紫外线、可见光和中红外光，甚至太赫兹辐射。这里在可见光范围内对探测器进行了表征；对650纳米和5.26微米进行了噪声分析。展示了线性功率特性以及对入射光脉冲长度的依赖性。分别给出了在可见光和中红外光谱区域应用的示例，如氧气和一氧化氮的二次谐波（2f）和吸收光谱。
