Optical cages
We examine arrays of metal-mesh frameworks for their wide-band absorption. These take the form of quasi-crystal optical cages. While there are many plasmonic structures that exhibit lossy behavior, they tend to be narrow band. By defining a quality loss metric, L = A/Q, where A is the absorption coe...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-01-01
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| Series: | Optical Materials: X |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590147819300051 |
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doaj-d547ed62f6f74434844b336f8287bb9f2020-11-25T01:57:15ZengElsevierOptical Materials: X2590-14782019-01-011Optical cagesV. Kumar0J.P. Walker1H. Grebel2The Electronic Imaging Center, The ECE Department at NJIT, Newark, NJ, 07102, USAThe Electronic Imaging Center, The ECE Department at NJIT, Newark, NJ, 07102, USACorresponding author.; The Electronic Imaging Center, The ECE Department at NJIT, Newark, NJ, 07102, USAWe examine arrays of metal-mesh frameworks for their wide-band absorption. These take the form of quasi-crystal optical cages. While there are many plasmonic structures that exhibit lossy behavior, they tend to be narrow band. By defining a quality loss metric, L = A/Q, where A is the absorption coefficient and Q is the quality factor, we are able to show that all absorbers fall in the range L:[0,2]. Metastructures have L∼0.04 while in our case L∼0.35. An array of cages tends to concentrate the incoming radiation within each framework. An array of cage-within-cage funnels the radiation from the outer cage to its inner core even further raising the possibility for new applications. We report on two surprising outcomes: copper based frameworks are better than silver based, and larger cage opening (thinner wires) are more effective than smaller openings (thicker wires).http://www.sciencedirect.com/science/article/pii/S2590147819300051 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
V. Kumar J.P. Walker H. Grebel |
| spellingShingle |
V. Kumar J.P. Walker H. Grebel Optical cages Optical Materials: X |
| author_facet |
V. Kumar J.P. Walker H. Grebel |
| author_sort |
V. Kumar |
| title |
Optical cages |
| title_short |
Optical cages |
| title_full |
Optical cages |
| title_fullStr |
Optical cages |
| title_full_unstemmed |
Optical cages |
| title_sort |
optical cages |
| publisher |
Elsevier |
| series |
Optical Materials: X |
| issn |
2590-1478 |
| publishDate |
2019-01-01 |
| description |
We examine arrays of metal-mesh frameworks for their wide-band absorption. These take the form of quasi-crystal optical cages. While there are many plasmonic structures that exhibit lossy behavior, they tend to be narrow band. By defining a quality loss metric, L = A/Q, where A is the absorption coefficient and Q is the quality factor, we are able to show that all absorbers fall in the range L:[0,2]. Metastructures have L∼0.04 while in our case L∼0.35. An array of cages tends to concentrate the incoming radiation within each framework. An array of cage-within-cage funnels the radiation from the outer cage to its inner core even further raising the possibility for new applications. We report on two surprising outcomes: copper based frameworks are better than silver based, and larger cage opening (thinner wires) are more effective than smaller openings (thicker wires). |
| url |
http://www.sciencedirect.com/science/article/pii/S2590147819300051 |
| work_keys_str_mv |
AT vkumar opticalcages AT jpwalker opticalcages AT hgrebel opticalcages |
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