naa a22 4500 51081753X CHVBK 20180411083515.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-013-9482-5 doi (NATIONALLICENCE)springer-10.1007/s11468-013-9482-5 Field distribution and quality factor of surface plasmon resonances of metal meshes for mid-infrared sensing [Elektronische Daten] [O. Limaj, M. Ortolani, V. Giliberti, A. Di Gaspare, F. Mattioli, S. Lupi] 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 2μm 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 · 10−3 nm−1, at least 1 order of magnitude better than standard mid-infrared absorption spectroscopy. Springer Science+Business Media New York, 2013 Surface plasmon nationallicence Mid-infrared nationallicence Sensor nationallicence Suspended mesh nationallicence Subradiant resonance nationallicence Dark mode nationallicence Limaj O. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut Ortolani M. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut Giliberti V. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut Di Gaspare A. CNR-Istituto di Fotonica e Nanotecnologie, Via Cineto Romano 42, 00156, Rome, Italy aut Mattioli F. CNR-Istituto di Fotonica e Nanotecnologie, Via Cineto Romano 42, 00156, Rome, Italy aut Lupi S. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 851-858 1557-1955 8:2<851 2013 8 11468 https://doi.org/10.1007/s11468-013-9482-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-013-9482-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Limaj O. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Ortolani M. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Giliberti V. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Di Gaspare A. CNR-Istituto di Fotonica e Nanotecnologie, Via Cineto Romano 42, 00156, Rome, Italy aut NATIONALLICENCE 700 1- Mattioli F. CNR-Istituto di Fotonica e Nanotecnologie, Via Cineto Romano 42, 00156, Rome, Italy aut NATIONALLICENCE 700 1- Lupi S. Department of Physics, Sapienza University of Rome and CNR-IOM, P.le Aldo Moro 2, 00185, Rome, Italy aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 851-858 1557-1955 8:2<851 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer