Journal
OPTICS LETTERS
Volume 39, Issue 5, Pages 1227-1230Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.39.001227
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Funding
- EPSRC [EP/I017461/1, EP/J018678/1]
- EPSRC [EP/I017461/1, EP/D501288/1, EP/J018678/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D501288/1, EP/J018678/1, EP/I017461/1] Funding Source: researchfish
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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 mu m. This resonance is in addition to the THz metamaterial absorption resonance at 109 mu m (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. (C) 2014 Optical Society of America
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