Security screening via computational imaging using frequency-diverse metasurface apertures

David R. Smith, Matthew S. Reynolds, Jonah N. Gollub, Daniel L. Marks, Mohammadreza F. Imani, Okan Yurduseven, Daniel Arnitz, Andreas Pedross-Engel, Timothy Sleasman, Parker Trofatter, Michael Boyarsky, Alec Rose, Hayrettin Odabasi, Guy Lipworth

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

Computational imaging is a proven strategy for obtaining high-quality images with fast acquisition rates and simpler hardware. Metasurfaces provide exquisite control over electromagnetic fields, enabling the radiated field to be molded into unique patterns. The fusion of these two concepts can bring about revolutionary advances in the design of imaging systems for security screening. In the context of computational imaging, each field pattern serves as a single measurement of a scene; imaging a scene can then be interpreted as estimating the reflectivity distribution of a target from a set of measurements. As with any computational imaging system, the key challenge is to arrive at a minimal set of measurements from which a diffraction-limited image can be resolved. Here, we show that the information content of a frequency-diverse metasurface aperture can be maximized by design, and used to construct a complete millimeter-wave imaging system spanning a 2 m by 2 m area, consisting of 96 metasurfaces, capable of producing diffraction-limited images of human-scale targets. The metasurfacebased frequency-diverse system presented in this work represents an inexpensive, but tremendously flexible alternative to traditional hardware paradigms, offering the possibility of low-cost, real-Time, and ubiquitous screening platforms.

Original languageEnglish (US)
Title of host publicationPassive and Active Millimeter-Wave Imaging XX
EditorsDavid A. Wikner, Duncan A. Robertson
PublisherSPIE
ISBN (Electronic)9781510608795
DOIs
StatePublished - 2017
Externally publishedYes
EventPassive and Active Millimeter-Wave Imaging XX 2017 - Anaheim, United States
Duration: Apr 13 2017 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10189
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferencePassive and Active Millimeter-Wave Imaging XX 2017
Country/TerritoryUnited States
CityAnaheim
Period4/13/17 → …

Keywords

  • Computational Imaging
  • Metamaterial
  • Metasurface
  • Mi-crowave Imaging
  • Real-Time Imaging
  • Security Screening

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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