Multiplexed coded time domain sampling with metamaterials.
Published
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
Language
- eng