Photonic Spin Hall Effect in Waveguides Composed of Two Types of Single-Negative Metamaterials

Guo, Zhiwei; Jiang, Haitao; Long, Yang; Yu, Kun; Ren, Jie; Xue, Chunhua; Chen, Hong

doi:10.1038/s41598-017-08171-y

Cited by 46 publications

(36 citation statements)

References 28 publications

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“…Therefore the two kinds of single negative band gap of figures 5(a) and (c) belong to different topological phases, respectively. The topological phase transition can take place when the system converts from effective elasticity negative (ENG) to effective mass negative (MNG), which is similar to the topological change between ENG (ò negative) and MNG (μ negative) in electromagnetism [51][52][53][54].…”

Section: Band Inversion and Zak Phasesmentioning

confidence: 99%

Dark state, zero-index and topology in phononic metamaterials with negative mass and negative coupling

et al. 2019

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Phononic metamaterials have attracted extensive attention since they are flexibly adjustable to control the transmission. Here we study a one-dimensional phononic metamaterial with negative mass and negative coupling, made of resonant oscillators and chiral couplings. At the frequency where the effective mass and coupling are both infinite, a flat band emerges that induces a sharply high density of states, reminiscent of the phononic dark states. At the critical point of band degeneracy, a phononic Dirac-like point emerges where both the effective mass and the inverse of effective coupling are simultaneously zero, so that zero-index is realized for phonons. Moreover, the phononic topological phase transition is observed when the phononic band gap switches between single mass-negative and single coupling-negative regimes. When these two distinct single negative phononic metamaterials are connected to each other, a phononic topological interface state is identified within the gap, manifested as the phononic counterpart of the topological Jackiw-Rebbi solution.

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Section: Band Inversion and Zak Phasesmentioning

confidence: 99%

Dark state, zero-index and topology in phononic metamaterials with negative mass and negative coupling

et al. 2019

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“…5(b) show the enlarged lumped variable capacitance diodes and the protected elements, respectively. Figure 5 C , the effective permittivity and permeability of 2D TLs in the long-wavelength limit can be written as [22,42]:…”

Section: Experimental Demonstration Of the Actively Tunable Topomentioning

confidence: 99%

Actively Controlling the Topological Transition of Dispersion Based on Electrically Controllable Metamaterials

et al. 2018

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Topological transition of the iso-frequency contour (IFC) from a closed ellipsoid to an open hyperboloid, will provide unique capabilities for controlling the propagation of light. However, the ability to actively tune these effects remains elusive and the related experimental observations are highly desirable. Here, tunable electric IFC in periodic structure which is composed of graphene/dielectric multilayers is investigated by tuning the chemical potential of graphene layer.Specially, we present the actively controlled transportation in two kinds of anisotropic zero-index media containing PEC/PMC impurities. At last, by adding variable capacitance diodes into two-dimensional transmission-line system, we present the experimental demonstration of the actively controlled magnetic topological transition of dispersion based on electrically controllable metamaterials. With the increase of voltage, we measure the different emission patterns from a point source inside the structure and observe the phase-transition process of IFCs. The realization of actively tuned topological transition will opens up a new avenue in the dynamical control of metamaterials.

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“…PSHE can be enhanced by metamaterials and metasurfaces. Guo experimentally demonstrated that the PSHE in waveguides with single‐negative metamaterials is robust against interface fluctuations, which may be applicable in the manipulation of electromagnetic signals . The spin‐dependent splitting can also be enhanced by increasing the rotation rate of local optical axes in the metasurfaces .…”

Section: Introductionmentioning

confidence: 99%

Magneto‐Optical Modulation of Photonic Spin Hall Effect of Graphene in Terahertz Region

Tang

Luo

et al. 2018

Advanced Optical Materials

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in the metasurfaces. [8] A giant PSHE with nearly 100% efficiency can be realized at certain metasurfaces of deep subwavelength thicknesses in gigahertz region. [9] Faraday rotation is a kind of magnetooptical (MO) effect, which means the polarization rotation of linearly polarized beam when it passes through a transparent medium. As a single layer of carbon atoms arranged in a hexagonal lattice, graphene has attracted great attention due to its gapless Dirac-type electron bandgap structure and high electron mobility. [10,11] It is a revolutionary optical material, which shows fantastic optical properties in photonics and optoelectronics for terahertz to mid-infrared applications. In terahertz region, graphene exhibits an obvious Faraday rotation, which can be used to design tunable devices based on its MO effect. [12,13] Meanwhile when a magnetic field is applied perpendicular to graphene, the hybridization of plasmons and cyclotron excitations generates graphene magneto-plasmons (GMP). The GMP modes can significantly affect the MO response of graphene waveguides. [14] Large Faraday rotation was achieved in arrays of graphene microribbons, through the excitation of the magneto-plasmons of individual ribbons. [15] In addition, the Faraday rotation can be modulated in intensity, tuned in frequency by strong magneto-plasmonic resonances in antidotpatterned graphene. [16] In this paper, we study the MO modulation of PSHE of transmitted light in graphene-substrate system in terahertz region to explore its new application in MO devices. The PSHE shift expressions in graphene-substrate system are given by the angular spectrum analysis. The MO-modulated PSHE of graphene is analyzed in detail and its potential applications in multichannel switch and barcode encryption are discussed.

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Photonic Spin Hall Effect in Waveguides Composed of Two Types of Single-Negative Metamaterials

Cited by 46 publications

References 28 publications

Dark state, zero-index and topology in phononic metamaterials with negative mass and negative coupling

Dark state, zero-index and topology in phononic metamaterials with negative mass and negative coupling

Actively Controlling the Topological Transition of Dispersion Based on Electrically Controllable Metamaterials

Magneto‐Optical Modulation of Photonic Spin Hall Effect of Graphene in Terahertz Region

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