Magneto-optical spin Hall effect of light in topological insulators

Zhou, Xiang; Ding, Yiping; Yue, Qinxin; He, Shangling; He, Yan; Deng, Dongmei

doi:10.1016/j.optlastec.2022.108115

Cited by 8 publications

(1 citation statement)

References 38 publications

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“…[11][12][13] It was found that the spin Hall effect in LHMs is unreversed, although the sign of refractive index gradient is reversed. [3,14] The PSHE has a wide range of applications which are not limited to high-sensitivity optical sensors, [15] barcode encryption, [16] biosensors, [17] magnetooptical devices, [18,19] and optical edge detection. [20] The concept of parity-time (PT) symmetry was first proposed by Bender et al in 1998.…”

Section: Introductionmentioning

confidence: 99%

Engineered photonic spin Hall effect of Gaussian beam in antisymmetric parity-time metamaterials

et al. 2023

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A model of the photonic spin Hall effect (PSHE) in antisymmetric parity-time (APT) metamaterials with incident by Gaussian beam is proposed here. We derive the displacement expression of the PSHE in APT metamaterials based on the transport properties of Gaussian beams in positive and negative refractive index materials. Furthermore, detailed discussions are provided on the APT scattering matrix, eigenstate ratio, and response near exceptional points (EP) in the case of loss or gain. In contrast to the unidirectional non-reflection in parity-time (PT) symmetric systems, the transverse shift (TS) that arises from both sides of the APT structure is consistent. By effectively adjusting the parameters of APT materials, we achieve giant displacements of the TS. Finally, we present a multi-layer APT structure consisting of alternating left-handed and right-handed materials. By increasing the number of layers, Bragg oscillations can be generated, leading to an increase in resonant peaks in transverse shift. This study presents a new approach to achieving giant transverse shifts (TS) in the antisymmetric parity-time (APT) structure. This lays a theoretical foundation for the fabrication of related nano-optical devices.

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Section: Introductionmentioning

confidence: 99%

Engineered photonic spin Hall effect of Gaussian beam in antisymmetric parity-time metamaterials

et al. 2023

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Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator

Yu,

Song,

et al. 2024

Results in Physics

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Current-induced switching of photonic spin Hall effect in a magnetic insulator based on spin–orbit torques

Tang

Liang

Tang

et al. 2023

Applied Physics Letters

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The photonic spin Hall effect (PSHE) is analogous to the electronic spin Hall effect, which has substantial potential for optoelectronic applications. However, PSHE-based devices are rarely studied, and manipulating the PSHE by charge current has remained elusive thus far. In this paper, we demonstrate current-induced switching of PSHE in the Ce1Dy2Al0.42Fe4.58O12 thin film capping with Pt electrodes, which is mediated by spin–orbit torques at the Pt/Ce1Dy2Al0.42Fe4.58O12 interface. The results show that the transverse beam shifts related to the PSHE can be reversed by applying a small order of magnitude charge current (∼108 A·m−2) to the Pt layer in opposite directions, which predicts low dissipation in our proposed heterostructure. In addition, by applying an in-plane magnetic field, the saturation beam shifts can be increased, which can significantly enhance the switching ratio.

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Magneto-optical spin Hall effect of light in topological insulators

Cited by 8 publications

References 38 publications

Engineered photonic spin Hall effect of Gaussian beam in antisymmetric parity-time metamaterials

Engineered photonic spin Hall effect of Gaussian beam in antisymmetric parity-time metamaterials

Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator

Current-induced switching of photonic spin Hall effect in a magnetic insulator based on spin–orbit torques

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