We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Field distribution and quality factor of surface plasmon resonances of metal meshes for mid-infrared sensing.
- Authors
Limaj, O.; Ortolani, M.; Giliberti, V.; Gaspare, A.; Mattioli, F.; Lupi, S.
- 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 μm 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 · 10 nm, at least 1 order of magnitude better than standard mid-infrared absorption spectroscopy.
- Subjects
QUALITY factor meters; SURFACE plasmon resonance; METAL mesh; LIGHT transmission; ANGLE of attack (Aerodynamics)
- Publication
Plasmonics, 2013, Vol 8, Issue 2, p851
- ISSN
1557-1955
- Publication type
Article
- DOI
10.1007/s11468-013-9482-5