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Real-time terahertz imaging with a single-pixel detector

Author

Listed:
  • Rayko Ivanov Stantchev

    (Chinese University of Hong Kong, Electronic Engineering)

  • Xiao Yu

    (Chongqing University
    University of Warwick, Physics)

  • Thierry Blu

    (Chinese University of Hong Kong, Electronic Engineering)

  • Emma Pickwell-MacPherson

    (Chinese University of Hong Kong, Electronic Engineering
    University of Warwick, Physics)

Abstract

Terahertz (THz) radiation is poised to have an essential role in many imaging applications, from industrial inspections to medical diagnosis. However, commercialization is prevented by impractical and expensive THz instrumentation. Single-pixel cameras have emerged as alternatives to multi-pixel cameras due to reduced costs and superior durability. Here, by optimizing the modulation geometry and post-processing algorithms, we demonstrate the acquisition of a THz-video (32 × 32 pixels at 6 frames-per-second), shown in real-time, using a single-pixel fiber-coupled photoconductive THz detector. A laser diode with a digital micromirror device shining visible light onto silicon acts as the spatial THz modulator. We mathematically account for the temporal response of the system, reduce noise with a lock-in free carrier-wave modulation and realize quick, noise-robust image undersampling. Since our modifications do not impose intricate manufacturing, require long post-processing, nor sacrifice the time-resolving capabilities of THz-spectrometers, their greatest asset, this work has the potential to serve as a foundation for all future single-pixel THz imaging systems.

Suggested Citation

  • Rayko Ivanov Stantchev & Xiao Yu & Thierry Blu & Emma Pickwell-MacPherson, 2020. "Real-time terahertz imaging with a single-pixel detector," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16370-x
    DOI: 10.1038/s41467-020-16370-x
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    Cited by:

    1. Patrick Kilcullen & Tsuneyuki Ozaki & Jinyang Liang, 2022. "Compressed ultrahigh-speed single-pixel imaging by swept aggregate patterns," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Junliang Dong & Pei You & Alessandro Tomasino & Aycan Yurtsever & Roberto Morandotti, 2023. "Single-shot ultrafast terahertz photography," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Yinqi Wang & Kun Huang & Jianan Fang & Ming Yan & E Wu & Heping Zeng, 2023. "Mid-infrared single-pixel imaging at the single-photon level," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    4. Kun Peng & Nicholas Paul Morgan & Ford M. Wagner & Thomas Siday & Chelsea Qiushi Xia & Didem Dede & Victor Boureau & Valerio Piazza & Anna Fontcuberta i Morral & Michael B. Johnston, 2024. "Direct and integrating sampling in terahertz receivers from wafer-scalable InAs nanowires," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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