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Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures

Publication ,  Journal Article
Diebold, AV; Imani, MF; Sleasmanand, T; Smith, DR
Published in: Optica
December 20, 2018

Phase information and spatially coherent illumination have usually been considered indispensable components of most microwave imaging systems. Dynamic metasurface apertures (DMAs)—with their ability to generate spatially incoherent illumination—have recently supplanted these assumptions in favor of simplified imaging hardware. In light of this development, we investigate the coherence of a phaseless imaging system based on metasurface apertures. In doing so, we propose and experimentally demonstrate coherent and incoherent computational microwave ghost imaging using DMAs. These apertures can generate a multitude of distinct speckle fields at a single frequency by modulating the electrical properties of radiating complementary metamaterial elements patterned into the surface of a waveguide. We show that a pair of dynamic apertures, one acting as transmit and the other as receive, can achieve two-dimensional, phaseless, coherent imaging. Further, by averaging the intensity measurements obtained in this manner over a random set or ensemble of receive aperture distributions, we demonstrate that an incoherent imaging system can be achieved in which single-port ensemble averaging by the electrically large DMA plays the role of spatial averaging in a bucket detector. We investigate the effects of these different imaging schemes on the resulting reconstructions and provide experimental demonstrations.

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Published In

Optica

DOI

ISSN

2334-2536

Publication Date

December 20, 2018

Volume

5

Issue

12

Start / End Page

1529 / 1541

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics
 

Citation

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Diebold, A. V., Imani, M. F., Sleasmanand, T., & Smith, D. R. (2018). Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures. Optica, 5(12), 1529–1541. https://doi.org/10.1364/OPTICA.5.001529
Diebold, A. V., M. F. Imani, T. Sleasmanand, and D. R. Smith. “Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures.” Optica 5, no. 12 (December 20, 2018): 1529–41. https://doi.org/10.1364/OPTICA.5.001529.
Diebold AV, Imani MF, Sleasmanand T, Smith DR. Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures. Optica. 2018 Dec 20;5(12):1529–41.
Diebold, A. V., et al. “Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures.” Optica, vol. 5, no. 12, Dec. 2018, pp. 1529–41. Scopus, doi:10.1364/OPTICA.5.001529.
Diebold AV, Imani MF, Sleasmanand T, Smith DR. Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures. Optica. 2018 Dec 20;5(12):1529–1541.
Journal cover image

Published In

Optica

DOI

ISSN

2334-2536

Publication Date

December 20, 2018

Volume

5

Issue

12

Start / End Page

1529 / 1541

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics