AI 中文总结
该研究提出多谐波锁相检测结合逆快速傅里叶变换的低温扫描激光显微镜技术，可高空间分辨率实现时间分辨热 susceptibility 成像，用于超导器件等低维系统的动态热表征。
AI 中文摘要
我们提出了一种多谐波锁相检测方法，该方法利用逆快速傅里叶变换以高空间分辨率重建热 susceptibility 的时间演化。该方法在定制的模块化扫描激光显微镜上实现，该显微镜设计用于在低工作距离光学低温恒温器中运行，并经过了彻底的空间精度校准。使用超导谐振器的示范性案例研究凸显了该技术在明显短于固有扫描速度的时间尺度上生成热图像的能力，从而能够实现具有高空间保真度的动态热表征。所提出的低温时间分辨扫描激光显微镜技术为探索超导器件、二维材料、混合平面结构以及其他低维系统提供了独特机会。
英文摘要
We present a multiharmonic lock-in detection approach that utilizes the inverse Fast Fourier Transform to reconstruct the time evolution of thermal susceptibility with high spatial resolution. The method is implemented on a custom-built, modular scanning laser microscope designed for operation in low working-distance optical cryostats and thoroughly calibrated for spatial accuracy. A demonstrative case study using a superconducting resonator highlights the capability of this technique to generate thermal images on time scales significantly shorter than the intrinsic scanning speed, thus enabling dynamic thermal characterization with high spatial fidelity. The proposed technique of low-temperature time-resolved scanning laser microscopy offers unique opportunities to explore superconducting devices, 2D materials, hybrid planar structures, and other low-dimensional systems.
