Compressed sensing with near-field THz radiation

By R. Stantchev, D. Phillips, P. Hobson, S. M. Hornett, Miles J. Padgett, E. Hendry. 2017

134 citations recorded by the source corpus.

We demonstrate a form of near-field terahertz (THz) imaging that is compatible with compressed sensing algorithms. By spatially photomodulating THz pulses using a set of shaped binary optical patterns and employing a 6-μm-thick silicon wafer, we are able to reconstruct THz images of an object placed on the exit interface of the wafer. A single-element detector is used to measure the electric field amplitude of transmitted THz radiation for each projected pattern, with the ultra-thin wafer allowing us to access the THz evanescent near fields to achieve a spatial resolution of ∼9  μm (λ/45 at 0.75 THz). We conclude by experimentally improving the image rate by a factor of ∼3 by undersampling the object with adaptive and compressed sensing algorithms.

Subfields: Acoustics and Ultrasonics, Biomedical Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/46f6cb86ff190935d02f5aae909ba606a3dcde75

How researchers see this paper

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In Biomedical Engineering

1. Hichem Guerboukha
2. Kathirvel Nallappan
3. Maksim Skorobogatiy

In Electrical and Electronic Engineering

1. Hichem Guerboukha
2. Kathirvel Nallappan
3. Maksim Skorobogatiy

Citations in the corpus

• Toward real-time terahertz imaging (2018, background): “[387], the same group demonstrated that the thickness of the silicon plate plays a crucial role in determining the resolution of the reconstructed image.”