Magnetophotonic intensity effects in hybrid metal-dielectric structures

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Fältnamn	Indikatorer	Metadata
000		04458naa a2200601 4500
001		oai:DiVA.org:kth-143050
003		SwePub
008		140317s2014 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1430502 URI
024	7	a https://doi.org/10.1103/PhysRevB.89.0451182 DOI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Belotelov, V. I.4 aut
245	1 0	a Magnetophotonic intensity effects in hybrid metal-dielectric structures
264	1	c 2014
338		a print2 rdacarrier
500		a QC 20140317
520		a The magneto-optical properties of a hybrid metal-dielectric structure consisting of a one-dimensional gold grating on top of a magnetic waveguide layer are studied experimentally and theoretically. It is demonstrated that a magnetic field applied in the longitudinal configuration (in the plane of the magnetic film and perpendicular to the slits in the gold grating) to the metal-dielectric structure modifies the field distribution of the optical modes and thus changes the mode excitation conditions. In the optical far field, this manifests in the alteration of the optical transmittance or reflectance when the structure becomes magnetized. This magneto-optical effect is shown to represent a novel class of effects related to the magnetic-field-induced modification of the Bloch modes of the periodic hybrid structure. That is why we define this effect as "longitudinal magnetophotonic intensity effect" (LMPIE). The LMPIE has two contributions, odd and even in magnetization. While the even LMPIE is maximal for the light polarized perpendicular to the grating slits (TM) and minimal for the orthogonal polarization (TE), the odd LMPIE takes maximum values at some intermediate polarization and vanishes for pure TM and TE polarizations. Two principal modes of the magnetic layer - TM and TE - acquire in the longitudinal magnetic field additional field components and thus turn into quasi-TM and quasi-TE modes, respectively. The largest LMPIE is observed for excitation of the antisymmetrical quasi-TE mode by TM-polarized light. The value of the LMPIE measured for the plasmonic structure with a magnetic film of Bi2Dy1Fe4Ga1O12 composition is about 1% for the even effect and 2% for the odd one. However, the plasmonic structure with a magnetic film with a higher concentration of bismuth (Bi2.97Er0.03Fe4Al0.5Ga0.5O12) gives significantly larger LMPIE: even LMPIE reaches 24% and odd LMPIE is 9%. Enhancement of the magneto-optical figure of merit (defined as the ratio of the specific Faraday angle of a magnetic film to its absorption coefficient) of the magnetic films potentially causes the even LMPIE to exceed 100% as is predicted by calculations. Thus, the nanostructured material described here may be considered as an ultrafast magnetophotonic light valve.
650	7	a NATURVETENSKAPx Fysikx Annan fysik0 (SwePub)103992 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciencesx Other Physics Topics0 (SwePub)103992 hsv//eng
653		a Surface-Plasmon Polaritons
653		a Thin Ferromagnetic-Films
653		a Magnetic-Field
653		a Magnetooptical Activity
653		a Gratings
653		a Transmission
653		a Crystals
653		a Nickel
653		a Metamaterials
653		a Permittivity
700	1	a Kreilkamp, L. E.4 aut
700	1	a Kalish, A. N.4 aut
700	1	a Akimov, I. A.4 aut
700	1	a Bykov, D. A.4 aut
700	1	a Kasture, S.4 aut
700	1	a Yallapragada, V. J.4 aut
700	1	a Gopal, A. V.4 aut
700	1	a Grishin, Alexander M.u KTH,Integrerade komponenter och kretsar4 aut0 (Swepub:kth)u179x9xt
700	1	a Khartsev, Sergiy I.u KTH,Integrerade komponenter och kretsar4 aut0 (Swepub:kth)u1barex4
700	1	a Nur-E-Alam, M.4 aut
700	1	a Vasiliev, M.4 aut
700	1	a Doskolovich, L. L.4 aut
700	1	a Yakovlev, D. R.4 aut
700	1	a Alameh, K.4 aut
700	1	a Zvezdin, A. K.4 aut
700	1	a Bayer, M.4 aut
710	2	a KTHb Integrerade komponenter och kretsar4 org
773	0	t Physical Review B. Condensed Matter and Materials Physicsg 89:4, s. 045118-q 89:4<045118-x 1098-0121x 1550-235X
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143050
856	4 8	u https://doi.org/10.1103/PhysRevB.89.045118

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Av författaren/redakt...: Belotelov, V. I.; Kreilkamp, L. E.; Kalish, A. N.; Akimov, I. A.; Bykov, D. A.; Kasture, S.; visa fler...; Yallapragada, V. ...; Gopal, A. V.; Grishin, Alexand ...; Khartsev, Sergiy ...; Nur-E-Alam, M.; Vasiliev, M.; Doskolovich, L. ...; Yakovlev, D. R.; Alameh, K.; Zvezdin, A. K.; Bayer, M.; visa färre...

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