Terahertz Diffractive Reflection Phase Imaging

Terahertz diffractive phase imaging is demonstrated by an iterative phase retrieval processing algorithm to assess the complex diffracted wave properties. We implemented this reflection geometry using a continuous wave system working at 0.3 THz. Targeting signal to noise ratio improvement, we take advantage of high dynamic range data fusion. We obtained and reconstructed diffraction images achieving better resolution compared to a conventional diffraction limited raster scanning technique. Submillimeter lateral resolution in reflection is demonstrated together with phase reconstruction.