论文标题
在低温温度下高Q散装声子模式的电力调节
Electro-Mechanical Tuning of High-Q Bulk Acoustic Phonon Modes at Cryogenic Temperatures
论文作者
论文摘要
我们研究了高温温度下石英大量声波谐振器的机电特性。通过施加直流偏置电压，我们证明了在4 K和20 mk的低温温度下，在石英大块声波腔中高Q声子模式的频率调整。对于高阶载体模式，可以看到超过100多个共振峰调谐的线宽度，而无需加载质量因子而没有任何降解的质量因子。对于所有模式和温度，观察到的频率调整系数为$ \ $ \ $ \ $ 3.5 MHz/v，每个载体号$ n $ $ n $，对应于$ n = 73 $ optertone模式，对应于255.5 MHz/v。对于应用偏置场的任何值，未观察到质量因子的降解。
We investigate the electromechanical properties of quartz bulk acoustic wave resonators at extreme cryogenic temperatures. By applying a DC bias voltage, we demonstrate broad frequency tuning of high-Q phonon modes in a quartz bulk acoustic wave cavity at cryogenic temperatures of 4 K and 20 mK. More than 100 line-widths of tuning of the resonance peak without any degradation in loaded quality factor, which are as high as $1.73\times 10^9$, is seen for high order overtone modes. For all modes and temperatures the observed coefficient of frequency tuning is $\approx$ 3.5 mHz/V per overtone number $n$ corresponding to a maximum of 255.5 mHz/V for the $n = 73$ overtone mode. No degradation in the quality factor is observed for any value of applied biasing field.
