High-resolution terahertz ptychography using divergent illumination and extrapolation algorithm
Optics and Lasers in Engineering(2021)
摘要
•Size of THz diffraction patterns are numerically expanded via extrapolation.•Recording more effective high-frequency information under the divergent illumination.•The experimental resolution of THz ptychography increases from 4.1λ to 1.5λ.
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关键词
Terahertz imaging,Phase imaging,Ptychography,Extrapolation algorithm,Divergent illumination
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