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Terahertz phase retrieval imaging in reflection
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DOI：10.1364/OL.397935.png)
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Terahertz phase retrieval is a promising technique able to assess the complex diffracted wave properties through an iterative processing algorithm. In this Letter, we demonstrate the implementation of this technique in reflection geometry with a continuous wave acquisition system working at 0.287 THz. To ensure a high signal-to-noise ratio in the measured dataset, we proposed a double parallel recording scheme with one detector and two lock-in amplifiers operating with the complimentary sensitivity setting. This provided a higher numerical aperture than conventional raster-scanning focal plane imaging. A specialized digital interferometric postprocessing procedure was applied to obtain a surface height map from the reconstructed phase distribution in the object's irradiated area. (C) 2020 Optical Society of America
Keyword:
WAVE-FRONT RECONSTRUCTION
LINE DIGITAL HOLOGRAPHY
RESOLUTION
MILLIMETER
AMPLITUDE
OBJECT
期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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引用论文
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