Enhancement of Faraday rotation effect in heterostructures with magneto-optical metals

Dong, Lijuan; Jiang, Haitao; Chen, Hong; Shi, Yanling

doi:10.1063/1.3406152

Cited by 27 publications

(16 citation statements)

References 19 publications

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“…Moreover, though reduced, the Faraday rotation angle (θ F ≈ −12 o ) is still enhanced by nearly a factor of three in comparison to the standalone MO-metal slab. Overall, the above results are in line with what observed in [18,19], but our configuration is structurally simpler and more compact, its total thickness being only ∼ 0.3λ at the nominal operational wavelength. On the other hand, the Faraday ellipticity (δ F ≈ −0.35), not considered in [18,19], is non-negligible.…”

Section: Realistic Lossy Casesupporting

confidence: 89%

“…More specifically, at optical frequencies, MO metals naturally behave as circularly-birefringent ENG media, whereas an all-dielectric photonic crystal operating in the bandgap region can effectively mimic an MNG-type behaviour [23]. Overall, taking into account realistic losses, multilayers containing a dozen layers (with total thickness of about 1.5 wavelengths) were shown to provide Faraday rotation angles of ∼ 15 o , with transmittance levels ∼ 0.3 that are about an order of magnitude higher than those pertaining to a standalone MO-metal slab [18,19].…”

Section: Introductionmentioning

confidence: 97%

“…Although these results may be readily extended to our gyrotropic case here, synthesizing MNG materials at optical frequencies is a very challenging task from the technological viewpoint. As a possible surrogate, the use of an all-dielectric photonic crystal or a magneto-photonic crystal operating in the bandgap was suggested in [18] and [19], respectively.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Faraday rotation via resonant tunnelling in tri-layers containing magneto-optical metals

Moccia¹,

Castaldi²,

Galdi³

et al. 2013

J. Phys. D: Appl. Phys.

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We study resonant tunnelling effects that can occur in tri-layer structures featuring a dielectric layer sandwiched between two magneto-optical-metal layers. We show that the resonance splitting associated with these phenomena can be exploited to enhance Faraday rotation at optical frequencies. Our results indicate that, in the presence of realistic loss levels, a tri-layer structure of sub-wavelength thickness is capable of yielding sensible (∼ 10 o ) Faraday rotation with transmittance levels that are an order of magnitude larger than those attainable with a standalone slab of magnetooptical metal of same thickness.

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Section: Realistic Lossy Casesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Faraday rotation via resonant tunnelling in tri-layers containing magneto-optical metals

Moccia¹,

Castaldi²,

Galdi³

et al. 2013

J. Phys. D: Appl. Phys.

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“…It has been reported that one-dimensional MPCs based on magnetic and nonmagnetic dielectric multilayers realize a huge Faraday rotation angle. [1][2][3][4][5] This MO enhancement originates from the localization of light at selected wavelengths in photonic band-gap structures. Similarly, MO cavities consisting of stacked layer structure enhance the MO effect by multiple re ections of light inside the structure.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

2016

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The magneto-optical (MO) properties of perpendicular magnetic Co 80 Pt 20 /Ag stacked lms with ZnO intermediate layers of different thickness were investigated by polar Kerr measurements. The insertion of a thin ZnO layer at the CoPt/Ag interface improved the perpendicular magnetic properties and MO enhancement at the plasma edge of Ag. The CoPt/Ag stacked lms with a 2-nm-thick ZnO layer exhibited an ideal square out-of-plane hysteresis loop with a relatively large Kerr angle of approximately 1.4 in the ultraviolet region. The peak position of the MO plasma enhancement shifted to longer wavelength as the thickness of the ZnO layer increased, and a new peak appeared consistent with the band-gap energy of ZnO. Moreover, the CoPt/ZnO/Ag stacked layer acted as a Fabry-Pérot etalon when the thickness of the ZnO layer was the sub-wavelength of incident light. As a result, a MO cavity was realized in the stacked lms, and an ideal square MO loop with a large Kerr rotation angle of approximately 20 was obtained in the visible region. The MO enhancement factor reached approximately 200. We demonstrated that the stacked lms were sensitive to changes in the optical conditions at the lm surface. The developed MO cavity can act as a highly accurate chemical and biological sensing system under simple measurement conditions.

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“…13 TPPs have also been proposed for use in switches, 14 and highly efficient, unidirectional transmission in an all-optical diode has been demonstrated using the interface states between a one-dimensional photonic crystal structure of SiO 2 and TiO 2 and a thick layer of silver. 15 TPPs have been shown to exist at an interface between a photonic crystal and a magnetophotonic crystal 16 or a magnetic metal, 17 and the enhancement of Faraday rotation and sharp transmission peaks have been suggested as useful characteristics for magnetotunable filters.…”

Section: Introductionmentioning

confidence: 99%

Tamm plasmon polaritons in multilayered cylindrical structures

et al. 2012

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'Tamm plasmon polaritons in multilayered cylindrical structures. ', Physical review B., 86 (23 Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. It is shown that cylindrical Bragg reflector structures with either a metal core, a metal cladding, or both can support Tamm plasmon polaritons (TPPs) that can propagate axially along the interface between the metallic layer and the adjacent dielectric. A transfer matrix formalism for cylindrical multilayered structures is used in association with cavity phase matching considerations to design structures that support Tamm plasmon polaritons at specified frequencies, and to explore the field distributions and the dispersion relations of the excitations. The cylindrical TPPs can exist in both the TE and TM polarizations for the special cases of modes with either azimuthal isotropy or zero axial propagation constant and also as hybrid cylindrical modes when neither of those conditions applies. In the cases considered the TPPs have low effective masses and low group velocities. Also, when there is both metallic core and cladding, near degenerate modes localized at each metallic interface can couple to produce symmetric and antisymmetric combinations whose frequency difference is in the terahertz regime.

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Enhancement of Faraday rotation effect in heterostructures with magneto-optical metals

Cited by 27 publications

References 19 publications

Enhanced Faraday rotation via resonant tunnelling in tri-layers containing magneto-optical metals

Enhanced Faraday rotation via resonant tunnelling in tri-layers containing magneto-optical metals

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

Tamm plasmon polaritons in multilayered cylindrical structures

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