Multiplexed coded time domain sampling with metamaterials.


Journal Article

The far infrared region of the electromagnetic spectrum often necessitates the use of thermal detectors that, by nature, typically have poor response times and diminished sensitivities, at least compared to adjacent bands. However, many signals of interest contain frequency components far too fast to be reliably measured with such detectors, and hence expensive and inefficient alternatives are brought to bear. Here we propose and experimentally validate a new method leveraging the speed and scalability of dynamic metamaterial modulators to encode high-frequency signal components at a lower frequency, making them reliably measurable with thermal detectors that would otherwise be too slow. An optimal weighing scheme design in the time domain is realized, the result being an imaging system whose time resolution is independent of detector speed and is rather limited only by the speed of the modulator and the reproducibility of the signal of interest.

Full Text

Duke Authors

Cited Authors

  • Nadell, CC; Fan, K; Suen, JY; Padilla, WJ

Published Date

  • October 2017

Published In

Volume / Issue

  • 25 / 21

Start / End Page

  • 25797 - 25808

PubMed ID

  • 29041243

Pubmed Central ID

  • 29041243

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.25.025797


  • eng