Near-field terahertz imaging with a dynamic aperture.
By introduction of an optical gating beam on a semiconductor wafer, near-field terahertz (THz) imaging with a dynamic aperture has been realized. The spatial resolution is determined by the focus size of the optical gating bean and the near-field diffraction effect. THz imaging with subwavelength spatial resolution (better than 50mum) is demonstrated.
Chen
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Q
Jiang
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Z
Xu
G X
GX
Zhang
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XC