Magneto-optical non-reciprocal devices in silicon photonics

Shoji, Yuya; Mizumoto, Tetsuya

doi:10.1088/1468-6996/15/1/014602

Cited by 175 publications

(84 citation statements)

References 49 publications

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“…4b). The Faraday rotation when the magnetization switches from − Ms to + Ms is close to 2°, i.e., 0.4 ° mm −1 , which is comparable to the known magneto-optic materials, like for example polycrystalline yttrium-iron garnet films29. The slight asymmetry in the loop is probably due to second-order MO effects, which depend on M 2 .…”

Section: Resultssupporting

confidence: 59%

Monolithic Magneto-Optical Nanocomposites of Barium Hexaferrite Platelets in PMMA

Ferk

Krajnc

Hamler

et al. 2015

Sci Rep

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The incorporation of magnetic barium hexaferrite nanoparticles in a transparent polymer matrix of poly(methyl methacrylate) (PMMA) is reported for the first time. The barium hexaferrite nanoplatelets doped with Sc3+, i.e., BaSc0.5Fe11.5O12 (BaHF), having diameters in the range 20 to 130 nm and thicknesses of approximately 5 nm, are synthesized hydrothermally and stabilized in 1-butanol with dodecylbenzenesulfonic acid. This method enables the preparation of monolithic nanocomposites by admixing the BaHF suspension into a liquid monomer, followed by in-situ, bulk free-radical polymerization. The PMMA retains its transparency for loadings of BaHF nanoparticles up to 0.27 wt.%, meaning that magnetically and optically anisotropic, monolithic nanocomposites can be synthesized when the polymerization is carried out in a magnetic field. The excellent dispersion of the magnetic nanoparticles, coupled with a reasonable control over the magnetic properties achieved in this investigation, is encouraging for the magneto-optical applications of these materials.

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Section: Resultssupporting

confidence: 59%

Monolithic Magneto-Optical Nanocomposites of Barium Hexaferrite Platelets in PMMA

Ferk

Krajnc

Hamler

et al. 2015

Sci Rep

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“…Combining Eqs. (11) with (2), it is possible to obtain the following expressions for the electromagnetic field at the metal film surface (z = d/2),…”

Section: Diffraction Of Plane Electromagnetic Wave On Metal Film mentioning

confidence: 99%

“…Similar phenomenon -nonreciprocal phase shift 2,3 -takes place in asymmetric structures 4 (e.g., waveguides) when the direction of propagation is perpendicular to the magnetic field (Voigt geometry). These phenomena consitute the basis for the operation principles of a variety of microwave photonic devices, such as optical isolators 5,6 , circulators 7,8 , and switches 9,10 (for a review on practical application of magnetooptical materials see 11,12 ).…”

Section: Introductionmentioning

confidence: 99%

Magnetic field assisted transmission of THz waves through a graphene layer combined with a periodically perforated metallic film

2018

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We consider a graphene sheet encapsulated in a two-dimensional metallic grating and a substrate (Al2O3) and subjected to an external magnetic field (in Faraday configuration). The grating consists of a thin perfectly conducting metal film perforated with a 2D periodic array of square holes. According to our calculations, significant changes in the spectra of the Faraday rotation angle of the transmitted wave and of the magnetic circular dichroism should be expected in this situation compared to bare graphene. We explain this enhancement by the excitation of graphene magnetoplasmons that accompanies the transmission of the electromagnetic wave through the structure. The results can be interesting for applications in THz photonics, such as switchable rotating polarizer and optical isolator.

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“…[1]). To this end, the nonreciprocal transmission has commonly been achieved via magneto-optical Faraday rotation effect [2], however, on chip-scale integrated photonics, it remains elusive due to unavailability of necessary materials to achieve sufficient Faraday rotation effect. Thus, there is an usual challenge in production of all-optical isolators on chip-scale device footprint.…”

mentioning

confidence: 99%

Exceptional Point and toward Mode-Selective Optical Isolation

et al. 2020

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Dynamical encirclement of an Exceptional Point (EP) and corresponding time-asymmetric mode evolution properties due to breakdown in adiabatic theorem have been a key to range of exotic physical effects in various open atomic, molecular and optical systems. Here, exploiting a gain-loss assisted dual-mode optical waveguide that hosts a dynamical EP-encirclement scheme, we have explored enhanced nonreciprocal effect in the dynamics of light with onset of saturable nonlinearity in the optical medium. We propose a prototype waveguide-based isolation scheme with judicious tuning of nonlinearity level where one can pass only a chosen mode in any of the desired directions as per device requirement. The deliberate presence of EP enormously enhances the nonreciprocal transmission contrast even up to 40 dB over the proposed device length with a scope of further scalability. This exclusive topologically robust mode selective all-optical isolation scheme will certainly offer opportunities in integrated photonic circuits for efficient coupling operation from external sources and improve device performances. arXiv:1904.07468v1 [physics.optics]

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Magneto-optical non-reciprocal devices in silicon photonics

Cited by 175 publications

References 49 publications

Monolithic Magneto-Optical Nanocomposites of Barium Hexaferrite Platelets in PMMA

Monolithic Magneto-Optical Nanocomposites of Barium Hexaferrite Platelets in PMMA

Magnetic field assisted transmission of THz waves through a graphene layer combined with a periodically perforated metallic film

Exceptional Point and toward Mode-Selective Optical Isolation

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