Spin canting induced nonreciprocal Goos-Hänchen shifts

Macêdo, Rair; Stamps, R. L.; Dumelow, T.

doi:10.1364/oe.22.028467

Cited by 35 publications

(20 citation statements)

References 31 publications

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“…Since it is extremely difficult to control light with a magnetic field in vacuum [28], magnetic [29][30][31] or conventional semiconducting [32] solid-state materials are widely used to mediate the interaction. In atomically thin semiconductors, an external magnetic field lifts the energy degeneracy of the K þ and K − valleys [ Fig.…”

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confidence: 99%

Magnetic-Field-Induced Rotation of Polarized Light Emission from MonolayerWS2

et al. 2016

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We control the linear polarization of emission from the coherently emitting K þ and K − valleys (valley coherence) in monolayer WS 2 with an out-of-plane magnetic field of up to 25 T. The magnetic-fieldinduced valley Zeeman splitting causes a rotation of the emission polarization with respect to the excitation by up to 35°and reduces the polarization degree by up to 16%. We explain both of these phenomena with a model based on two noninteracting coherent two-level systems. We deduce that the coherent light emission from the valleys decays with a time constant of τ c ¼ 260 fs.

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confidence: 99%

Magnetic-Field-Induced Rotation of Polarized Light Emission from MonolayerWS2

et al. 2016

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“…Note that the relation given by Eq. 13is substantially different for that given elsewhere for canted antiferromagnets [19,22]. This comes as a consequence of the easy-axis rotation shown in Fig.…”

Section: Attenuated Total Reflectionmentioning

confidence: 62%

“…1(a). The spin canting is quantified by an angle α which is a function of the aforementioned fields [19,21,22]. The resonance frequency now becomes…”

Section: Fig 1 (A) Geometry Showing the Rotation Of The Easy Axis Imentioning

confidence: 99%

Engineering terahertz surface magnon-polaritons in hyperbolic antiferromagnets

Macêdo

Camley

2019

Phys. Rev. B

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Magnetic crystals were recently studied as a route to hyperbolic dispersion and the effects associated with it. These studies, however, concentrated on bulk waves and frequencies where transmission is possible and where negative refraction occurs. Here, in contrast, we concentrate on geometries which sample regions of the dispersion relations where bulk propagation is not possible. This is done by controlling the orientation of the uniaxial anisotropy axis with respect to the surface of the crystal. Furthermore, we find that new magnetic surface polaritons exist in these regions, and we investigate the nature of these waves. In addition, significant tunability can be introduced by applying an external field perpendicular to the easy axes of a uniaxial antiferromagnet, creating a canted structure and generally shifting the frequencies to higher values. This externally applied field dramatically changes the nature of both surface and bulk polaritons, making them highly nonreciprocal.

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“…These phenomena occur in optical waves, matter waves, and acoustic waves and have many applications, such as sensing, imaging, and detection . These optical beam shifts attribute to external thermal force , external magnetic field , external electric, and magnetic field .…”

Section: Introductionmentioning

confidence: 99%

Optical beam shift induced by direct current

Jiao

Bai

Zhao

et al. 2017

Physica Status Solidi (a)

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Optical beam shift is related to external conditions. Here, optical spot position and the polarization properties of the totally polarized, P-polarized, and S-polarized laser beams reflected from an aluminum film as a function of the external direct current (DC) voltage are measured by a Slit Beam Profiler and a polarimeter. The results show that the optical beam shift of the totally polarized laser beam and the Spolarized laser beam jumps from 500 to 590 mm, and À10 to 70 mm, respectively, at different critical pressures, when the external DC value changes from 0 to 2.5 V, while the optical beam shift of the P-polarized laser beam is small and has no jump. The degree of linear polarization of different polarized laser beams cannot change, while the degree of circular polarization of different polarized laser beams changes as a function of the external DC voltage value.

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Spin canting induced nonreciprocal Goos-Hänchen shifts

Cited by 35 publications

References 31 publications

Magnetic-Field-Induced Rotation of Polarized Light Emission from MonolayerWS2

Magnetic-Field-Induced Rotation of Polarized Light Emission from MonolayerWS2

Engineering terahertz surface magnon-polaritons in hyperbolic antiferromagnets

Optical beam shift induced by direct current

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