Multispectral metamaterial absorber

We present the simulation, implementation, and measurement of a multispectral metamaterial absorber (MSMMA) and show that we can realize a simple absorber structure that operates in the mid-IR and terahertz (THz) bands. By embedding an IR metamaterial absorber layer into a standard THz metamaterial...

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Bibliographic Details
Published in:Optics letters 2014-03, Vol.39 (5), p.1227-1230
Main Authors: Grant, J, McCrindle, I J H, Li, C, Cumming, D R S
Format: Article
Language:English
Subjects:
Banded structure
Bands
Focal plane
Metamaterials
Narrowband
Peak frequency
Simulation
Wavelengths
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Summary:We present the simulation, implementation, and measurement of a multispectral metamaterial absorber (MSMMA) and show that we can realize a simple absorber structure that operates in the mid-IR and terahertz (THz) bands. By embedding an IR metamaterial absorber layer into a standard THz metamaterial absorber stack, a narrowband resonance is induced at a wavelength of 4.3 μm. This resonance is in addition to the THz metamaterial absorption resonance at 109 μm (2.75 THz). We demonstrate the inherent scalability and versatility of our MSMMA by describing a second device whereby the MM-induced IR absorption peak frequency is tuned by varying the IR absorber geometry. Such a MSMMA could be coupled with a suitable sensor and formed into a focal plane array, enabling multispectral imaging.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.001227