论文标题
幽灵自旋THZ-Emitter-Array显微镜
Ghost spintronic THz-emitter-array microscope
论文作者
论文摘要
Terahertz（THZ）波在非破坏性测试，生物检测和癌症成像中显示出巨大的潜力。最近在近场探针/孔径上进行了THZ波的进展，可以在近场区域对物体表面进行机械栅格扫描，而有效的，无扫描的，非侵入性，无创，深层划分限制的成像仍然具有挑战性。在这里，我们使用可重构的Spintronic Thz发射器阵列（STEA）和计算幽灵成像演示了THZ近场显微镜。通过在近场中使用可重构的stea来照亮对象并计算相关测量，我们可以通过深度亚分辨率分辨率重建其图像。通过循环外部磁场，实现了THZ波的在线极化旋转，从而使融合的图像对比度无极化。相干THZ脉冲的飞行时间（TOF）测量进一步使能够在不同距离或深度的物体上解析物体。展示的幽灵旋转Thz-Emitter-Array显微镜（Ghosteam）是一种用于THZ近场实时成像的新成像工具（具有视频帧量的潜力），尤其是在非宽带频率范围内开放范式偏移的机会，从0.1 thz到30 thz（即3.3-1000 cm-1）。
Terahertz (THz) wave shows great potential in non-destructive testing, bio detection and cancer imaging. Recent progresses on THz wave near-field probes/apertures enable mechanically raster scanning of an object's surface in the near-field region, while an efficient, non-scanning, non-invasive, deeply sub-diffraction-limited imaging still remains challenging. Here, we demonstrate a THz near-field microscopy using a reconfigurable spintronic THz emitter array (STEA) with computational ghost imaging. By illuminating an object with the reconfigurable STEA in near field and computing the correlation measurements, we reconstruct its image with deeply sub-diffraction resolution. By circulating an external magnetic field, the in-line polarization rotation of THz waves is realized, making the fused image contrast polarization-free. The time-of-flight (TOF) measurements of coherent THz pulses further enables to resolve objects at different distances or depths. The demonstrated ghost spintronic THz-emitter-array microscope (GHOSTEAM) is a new imaging tool for THz near-field real-time imaging (with potential of video framerate), especially opening up paradigm-shift opportunities in non-intrusive label-free bioimaging in a broadband frequency range from 0.1 THz to 30 THz (namely 3.3-1000 cm-1).
