热调谐声表面波谐振腔
Thermally Tunable Surface Acoustic Wave Cavities
摘要：
实验研究了在铌酸锂衬底上周期性排列金属条的声表面波谐振腔中声场的动态调谐。将直流电压施加到金属网格的端部会由于电阻加热而导致温度上升，这会将器件的频率响应改变高达0.3%，这可以用于控制通过结构的声学传输。的切换的时间尺度被证明是约200 ms。此外，我们还进行了有限元模拟的模型系统的透射谱表现出与实验数据一致的温度依赖性。这里所示的进步使容易，连续，动态控制，并可应用于各种基板。
英文摘要：
We experimentally demonstrate the dynamical tuning of the acoustic field in a surface acoustic wave (SAW) cavity defined by a periodic arrangement of metal stripes on LiNbO3 substrate. Applying a DC voltage to the ends of the metal grid results in a temperature rise due to resistive heating that changes the frequency response of the device up to 0.3%, which can be used to control the acoustic transmission through the structure. The time scale of the switching is demonstrated to be of about 200 ms. In addition, we have also performed finite element simulations of the transmission spectrum of a model system which exhibit a temperature dependence consistent with the experimental data. The advances shown here enable easy, continuous, dynamical control and could be applied for a variety of substrates.
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