Terahertz compressive imaging with metamaterial spatial light modulators

Journal Article

Imaging at long wavelengths, for example at terahertz and millimetre-wave frequencies, is a highly sought-after goal of researchers because of the great potential for applications ranging from security screening and skin cancer detection to all-weather navigation and biodetection. Here, we design, fabricate and demonstrate active metamaterials that function as real-time tunable, spectrally sensitive spatial masks for terahertz imaging with only a single-pixel detector. A modulation technique permits imaging with negative mask values, which is typically difficult to achieve with intensity-based components. We demonstrate compressive techniques allowing the acquisition of high-frame-rate, high-fidelity images. Our system is all solid-state with no moving parts, yields improved signal-to-noise ratios over standard raster-scanning techniques, and uses a source orders of magnitude lower in power than conventional set-ups. The demonstrated imaging system establishes a new path for terahertz imaging that is distinct from existing focal-plane-array-based cameras. © 2014 Macmillan Publishers Limited. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Watts, CM; Shrekenhamer, D; Montoya, J; Lipworth, G; Hunt, J; Sleasman, T; Krishna, S; Smith, DR; Padilla, WJ

Published Date

  • January 1, 2014

Published In

Volume / Issue

  • 8 / 8

Start / End Page

  • 605 - 609

Electronic International Standard Serial Number (EISSN)

  • 1749-4893

International Standard Serial Number (ISSN)

  • 1749-4885

Digital Object Identifier (DOI)

  • 10.1038/nphoton.2014.139

Citation Source

  • Scopus