http://www.cnr.it/ontology/cnr/individuo/prodotto/ID320175
Field distribution and quality factor of surface plasmon resonances of metal meshes for mid-infrared sensing (Articolo in rivista)
- Type
- Label
- Field distribution and quality factor of surface plasmon resonances of metal meshes for mid-infrared sensing (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1007/s11468-013-9482-5 (literal)
- Alternative label
Limaj, O.; Ortolani, M.; Giliberti, V.; Di Gaspare, A.; Mattioli, F.; Lupi, S. (2013)
Field distribution and quality factor of surface plasmon resonances of metal meshes for mid-infrared sensing
in Plasmonics (Norwell, Mass.)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Limaj, O.; Ortolani, M.; Giliberti, V.; Di Gaspare, A.; Mattioli, F.; Lupi, S. (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Sapienza University Rome; Consiglio Nazionale delle Ricerche (CNR); Consiglio Nazionale delle Ricerche (CNR) (literal)
- Titolo
- Field distribution and quality factor of surface plasmon resonances of metal meshes for mid-infrared sensing (literal)
- Abstract
- We studied surface plasmon sensors based on micrometric metal meshes by optical transmission spectroscopy as a function of the angle of incidence. The mesh period was set to 2 mu m for operation at mid-infrared wavelengths. Metal meshes on dielectric substrates were compared to suspended meshes obtained with a lift-off-free fabrication process, which reduces plasmon damping and increases the quality factor up to 25. We have numerically calculated the electric field distribution of \"dark\" quadrupole-like modes and found that the suspended mesh provides an enhanced interaction volume extending up to hundreds of nanometers in free space. Our sensors have been experimentally tested and they exhibited a sensitivity up to 1.4 center dot 10(-3)nm(-1), at least 1 order of magnitude better than standard mid-infrared absorption spectroscopy. (literal)
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