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Metamaterial-based imaging for potential security applications

Publication ,  Conference
Shrekenhamer, D; Watts, CM; Montoy, J; Krishna, S; Padilla, WJ
Published in: Proceedings of SPIE - The International Society for Optical Engineering
June 3, 2013

In this paper, we present two different types of THz spatial light modulators (SLMs) that use dynamic metamaterials (MMs) to enable multiplex imaging. One imaging setup consists of a doped semiconducting MM as the SLM, with multi-color super-pixels composed of arrays of electronically controlled metamaterial absorbers (MMAs). Our device is capable of modulation of THz radiation at frequencies up to 12 MHz with maximum modulation depths over 50%. We have also implemented a different system enabling high resolution, high-fidelity, multiplex single pixel THz imaging. We use optical photoexcitation of semiconductors to dynamically tune the electromagnetic properties of MMs. By copropagating a THz and collimated optical laser beam through a high-resistivity silicon (Si) wafer with a MM patterned on the surface, we may modify the THz transmission in real-time by modifying the optical power. By further encoding a spatial pattern on the optical beam, with a digital micro-mirror device (DMD), we may write masks for THz radiation. © 2013 SPIE.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

June 3, 2013

Volume

8632

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Shrekenhamer, D., Watts, C. M., Montoy, J., Krishna, S., & Padilla, W. J. (2013). Metamaterial-based imaging for potential security applications. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8632). https://doi.org/10.1117/12.2013145
Shrekenhamer, D., C. M. Watts, J. Montoy, S. Krishna, and W. J. Padilla. “Metamaterial-based imaging for potential security applications.” In Proceedings of SPIE - The International Society for Optical Engineering, Vol. 8632, 2013. https://doi.org/10.1117/12.2013145.
Shrekenhamer D, Watts CM, Montoy J, Krishna S, Padilla WJ. Metamaterial-based imaging for potential security applications. In: Proceedings of SPIE - The International Society for Optical Engineering. 2013.
Shrekenhamer, D., et al. “Metamaterial-based imaging for potential security applications.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 8632, 2013. Scopus, doi:10.1117/12.2013145.
Shrekenhamer D, Watts CM, Montoy J, Krishna S, Padilla WJ. Metamaterial-based imaging for potential security applications. Proceedings of SPIE - The International Society for Optical Engineering. 2013.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

June 3, 2013

Volume

8632

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering