Yu, P;
Wu, J;
Ashalley, E;
Govorov, A;
Wang, Z;
(2016)
Dual-band absorber for multispectral plasmon-enhanced infrared photodetection.
Journal Of Physics D: Applied Physics
, 49
(36)
, Article 365101. 10.1088/0022-3727/49/36/365101.
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Abstract
For most of the reported metamaterial absorbers, the peak absorption only occurs at one single wavelength. Here, we investigated a dual-band absorber which is based on simple gold nano-rings. Two absorption peaks can be readily achieved in 3–5 µm and 8–14 µm via tuning the width and radius of gold nano-rings and dielectric constant. The average maximum absorption of two bands can be as high as 95.1% (−0.22 dB). Based on the simulation results, the perfect absorber with nano-rings demonstrates great flexibility to create dual-band or triple-band absorption, and thus holds potential for further applications in thermophotovoltaics, multicolor infrared focal plane arrays, optical filters, and biological sensing applications.
| Type: | Article |
|---|---|
| Title: | Dual-band absorber for multispectral plasmon-enhanced infrared photodetection |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0022-3727/49/36/365101 |
| Publisher version: | http://dx.doi.org/10.1088/0022-3727/49/36/365101 |
| Language: | English |
| Additional information: | Copyright © 2016 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in the Journal Of Physics D: Applied Physics. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0022-3727/49/36/365101 |
| Keywords: | metamaterials, dual-band, plasmonics, infrared detector, perfect absorber, FDTD |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1522579 |
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