论文标题
部分可观测时空混沌系统的无模型预测
Scanning X-ray diffraction microscopy of a 6 GHz surface acoustic wave
论文作者
论文摘要
在几个GHz以外的频率下的表面声波是量子技术应用的有希望的组成部分。应用扫描X射线衍射微拷贝，我们直接绘制由由$λ\ simeq500 \，$ nm，$ nm的GAAS上的站立表面波产生产生的三维应变场的局部分辨要素，与6 GHz接近6 GHz的频率相对应。我们发现，与沿传播方向相比，垂直于表面的晶格失真是相移的。基于雷利波的模型计算证实了我们的测量值。我们的结果代表了一个突破，即提供了超出普通成像的射频表面声波的完整表征。
Surface acoustic waves at frequencies beyond a few GHz are promising components for quantum technology applications. Applying scanning X-ray diffraction microcopy we directly map the locally resolved components of the three-dimensional strain field generated by a standing surface acoustic wave on GaAs with wavelength $λ\simeq500\,$nm corresponding to frequencies near 6 GHz. We find that the lattice distortions perpendicular to the surface are phase-shifted compared to those in propagation direction. Model calculations based on Rayleigh waves confirm our measurements. Our results represent a break through in providing a full characterization of a radio frequency surface acoustic wave beyond plain imaging.
