论文标题
可调表面声波腔
Thermally Tunable Surface Acoustic Wave Cavities
论文作者
论文摘要
我们通过实验证明了由LINBO3底物上的金属条纹定期排列定义的表面声波（SAW）腔中声场的动力调节。将直流电压施加到金属网格的末端会导致由于电阻加热而导致的温度升高，该电阻会改变设备的频率响应高达0.3％，可用于控制通过结构的声传输。切换的时间尺度已证明约为200毫秒。此外，我们还对模型系统的传输光谱进行了有限元模拟，该模型系统表现出与实验数据一致的温度依赖性。此处显示的进步可实现易于，连续，动态控制，并且可以用于多种底物。
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.
