Magneto-plasmonic response as a perspective tool to magnetic field sensing

0451177 - ÚPT 2016 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Otipka, P. - Vlček, J. - Lesňák, M. - Sobota, Jaroslav
Magneto-plasmonic response as a perspective tool to magnetic field sensing.
Optical Sensors 2015 (Proceedings of SPIE 9506). Bellingham: SPIE, 2015, 95061W:1-6. ISBN 9781628416275. ISSN 0277-786X.
[Optical Sensors 2015. Prague (CZ), 13.04.2015-16.04.2015]
Grant CEP: GA MŠMT(CZ) LO1212
Institucionální podpora: RVO:68081731
Klíčová slova: magneto-plasmonics * planar nanostructures * response factors
Kód oboru RIV: BH - Optika, masery a lasery

The non-reciprocity of magneto-optical reflection response by surface plasmon excitation in the planar Au/Fe/Au/glass nano-systems with prism coupling is studied. These structures are intended as magnetic field sensor units combining magneto-optical (MO) and surface-plasmon-resonance (SPR) effects. The ability of MO-SPR systems to magnetic field sensing is analysed using incidence-angle-depending response function (Rpp(+) – Rpp(-))/(Rpp (+) + Rpp (-)), where Rpp denotes the reflectance of p-polarized beam; and, the sign in upper index relates to the orientation of external magnetic field. The proposed sensitivity criteria F and K (the magnitude and inflexed tangent of the response function oscillation) are applied in transverse MO configuration. Mathematical model based on the own matrix algorithm is applied to simulate the diffraction response to varying external magnetic field at the wavelength 632.8 nm. Obtained theoretical results are compared with experiments realized using the measuring device Multiskop (Optrel GbR, Germany).
Trvalý link: http://hdl.handle.net/11104/0252375