发表机构
Tianjin University（天津大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出超导Talbot效应，通过相控阵约瑟夫森结主动操控干涉图案，并利用游标尺阵列实现亚波长采样，从而提取费米波长，为量子材料诊断提供新框架。
AI 中文摘要
我们引入了超导Talbot效应——一种宏观量子自成像现象，当邻近化的库珀对在弹道二维电子气中传播时发生。通过将周期性超导引线配置为具有可编程相位差的相控阵约瑟夫森结，我们演示了对由此产生的超导Talbot地毯的主动操控。为了克服输运分辨率的限制，我们设计了一种游标尺收集器阵列，对分数Talbot图案进行亚波长采样。该方法以对无序的高鲁棒性映射实空间量子干涉，从而能够直接从螺旋、自旋简并和自旋轨道分裂费米面提取费米波长。在方格上的紧束缚数值计算验证了实空间干涉图案。我们的结果为超导光学中的相干波前工程和量子材料诊断建立了一个多功能框架。
英文摘要
We introduce the superconducting Talbot effect---a macroscopic quantum self-imaging phenomenon occurring when proximitized Cooper pairs propagate through a ballistic two-dimensional electron gas. By configuring periodic superconducting leads into a phased-array Josephson junction with programmable phase differences, we demonstrate active steering of the resulting superconducting Talbot carpet. To overcome transport resolution limits, we design a Vernier-scale collector array that performs sub-wavelength sampling of the fractional Talbot pattern. This approach maps real-space quantum interference with high robustness to disorder, enabling direct extraction of Fermi wavelengths across helical, spin-degenerate, and spin-orbit-split Fermi surfaces. Tight-binding numerical calculations on a square lattice validate the real-space interference patterns. Our results establish a versatile framework for coherent wavefront engineering and quantum materials diagnostics in superconducting optics.
Comments14 pages, 5 figures
