论文标题
Gigahertz Quasi-rayleigh和Quasi-Love模式之间的绝热转换，用于音调集成电路
Adiabatic conversion between gigahertz quasi-Rayleigh and quasi-Love modes for phononic integrated circuits
论文作者
论文摘要
已经提出了用于片上声学信息处理的无用的语音集成电路。受常规跨数字传感器的操作机理的限制，在类似式的gan-love模式的激发效率低下，因此高效的瑞利（Rayleigh-to-Love）模式转换器对未来的集成音调设备具有重要意义。在这里，我们提出了基于绝热转换机制的高效率和健壮的语音模式转换器。利用底物的各向异性弹性特性，绝热模式转换器通过简单的锥形语音波导实现。转换效率超过$ 98 \％$，$ 3 \，\ Mathrm {db} $ bandwidth $ 1.7 \，\ Mathrm {ghz} $可以实现用于在GHz频带上工作的声音saveguides，并且对制造错误的极好的容忍度也得到了数字验证。我们提出的设备在经典和量子语音信息处理中都可以有用，并且绝热机制可以推广到其他语音设备设计。
Unsuspended phononic integrated circuits have been proposed for on-chip acoustic information processing. Limited by the operation mechanism of a conventional interdigital transducer, the excitation of the quasi-Love mode in GaN-on-Sapphire is inefficient and thus a high-efficiency Rayleigh-to-Love mode converter is of great significance for future integrated phononic devices. Here, we propose a high-efficiency and robust phononic mode converter based on an adiabatic conversion mechanism. Utilizing the anisotropic elastic property of the substrate, the adiabatic mode converter is realized by a simple tapered phononic waveguide. A conversion efficiency exceeds $98\%$ with a $3\,\mathrm{dB}$ bandwidth of $1.7\,\mathrm{GHz}$ can be realized for phononic waveguides working at GHz frequency band, and excellent tolerance to the fabrication errors is also numerically validated. The device that we proposed can be useful in both classical and quantum phononic information processing, and the adiabatic mechanism could be generalized to other phononic device designs.
