Terahertz (THz) waves show great potential in nondestructive testing, biodetection and cancer imaging. Despite recent progress in THz wave near-field probes/apertures enabling raster scanning of an object’s surface, an efficient, nonscanning, noninvasive, deep subdiffraction imaging technique remains challenging. Here, we demonstrate THz near-field microscopy using a reconfigurable spintronic THz emitter array (STEA) based on the computational ghost imaging principle. By illuminating an object with the reconfigurable STEA followed by computing the correlation, we can reconstruct an image of the object with deep subdiffraction resolution. By applying an external magnetic field, in-line polarization rotation of the THz wave is realized, making the fused image contrast polarization-free. Time-of-flight (TOF) measurements of coherent THz pulses further enable objects at different distances or depths to be resolved. The demonstrated ghost spintronic THz-emitter-array microscope (GHOSTEAM) is a radically novel imaging tool for THz near-field imaging, opening paradigm-shifting opportunities for nonintrusive label-free bioimaging in a broadband frequency range from 0.1 to 30 THz (namely, 3.3–1000 cm⁻¹).

太赫兹（THz）波在无损检测，生物检测和癌症成像中显示出巨大潜力。尽管在太赫兹波近场探针/孔径方面取得了新进展，可以对物体的表面进行光栅扫描，但是有效的，非扫描，非侵入性的深亚衍射成像技术仍然具有挑战性。在这里，我们基于计算重影成像原理，使用可重新配置的自旋电子THz发射器阵列（STEA），演示了THz近场显微镜。通过使用可重新配置的STEA照射物体，然后计算相关性，我们可以重建具有深亚衍射分辨率的物体图像。通过施加外部磁场，实现了太赫兹波的在线偏振旋转，使融合图像的对比度没有偏振。相干太赫兹脉冲的飞行时间（TOF）测量可以进一步分辨不同距离或深度的物体。演示过的幽灵自旋电子THz发射极阵列显微镜（GHOSTEAM）是一种用于THz近场成像的全新的成像工具，为0.1至30 THz的宽带频率范围内的非侵入式无标记生物成像打开了范式转移的机会（即， 3.3–1000厘米^-1）。