论文标题
软夹语音二聚体用于机械感应和转导
Soft-clamped phononic dimers for mechanical sensing and transduction
论文作者
论文摘要
在许多研究领域中，耦合的微力机械谐振器具有重大兴趣，范围从同步，非线性动力学和混乱到量子传感和转导。在我们对软膜谐振器上的工作的基础，在这里，我们介绍了一项关于语音二聚体的研究，该研究由两个嵌入语音晶体膜中的缺陷组成。这些设备表现出广泛可调的（2-100 kHz）缺失相间的耦合强度，导致在室温下使用机械QF产品> 10^14 Hz的离域混合模式，从而确保了低热机械力噪声。模式分裂表现出对晶格内二聚体方向的强烈依赖，以及两个缺陷之间的空间分离。鉴于动态范围对于传感应用的重要性，我们表征了相关的机械非线性，特别是自我和交叉脱落参数以及自我和跨非线性阻尼。这项工作建立了具有工程的空间和光谱多模式结构的软晶格谐振器，作为经典和量子制度中的多功能机械平台。在微波对光转导和磁共振力显微镜中的应用是特别有吸引力的前景。
Coupled micro- and nanomechanical resonators are of significant interest within a number of areas of research, ranging from synchronisation, nonlinear dynamics and chaos, to quantum sensing and transduction. Building upon our work on soft-clamped membrane resonators, here we present a study on phononic dimers, consisting of two defects embedded in a phononic crystal membrane. These devices exhibit widely tunable (2-100 kHz) inter-defect coupling strengths, leading to delocalized hybrid modes with mechanical Qf-products > 10^14 Hz at room temperature,ensuring low thermomechanical force noise. The mode splitting exhibits a strong dependence on the dimer orientation within the crystal lattice, as well as the spatial separation between the two defects. Given the importance of dynamic range for sensing applications, we characterize the relevant mechanical nonlinearities, specifically the self- and cross-Duffing parameters, as well as self and cross-nonlinear dampings. This work establishes soft-clamped resonators with engineered spatial and spectral multi-mode structure as a versatile mechanical platform both in the classical and quantum regimes. Applications in microwave-to-optical transduction and magnetic resonance force microscopy are particularly attractive prospects.
