Goos–Hänchen and Imbert–Fedorov shifts in tiltedWeyl semimetals

Liu, Shuoqing; Song, Yifei; Wan, Ting; Ke, Yougang; Luo, Zhaoming

doi:10.1088/1674-1056/ac4e03

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…More recently, there has been increasing interest in studying GH displacement at anisotropic interfaces, including chiral metamaterials [37,38], graphene-on-substrate systems [39][40][41], and semimetal metamaterials [42][43][44]. Previous studies have extensively examined the variations of anisotropic interface parameters on GH displacement and explored methods for manipulating it.…”

Section: Introductionmentioning

confidence: 99%

Interference effect on Goos–Hänchen shifts of anisotropic medium interface

Li,

Chen,

et al. 2023

New J. Phys.

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We present a comprehensive analysis of the anomalous Goos–Hänchen (GH) displacement that occurs during the reflection of light beams at an interface between air and an anisotropic medium. This analysis also applies to the Imbert–Fedorov effect. Our study suggests that the anomalous GH displacement is primarily caused by polarization-dependent abnormal interference effects between the direct and cross-reflected light fields. Using the interface between air and a type II Weyl semimetal as an example, we provide a clear physical explanation for the relationship between spin-dependent abnormal interference effects and anomalous GH displacement. We demonstrate that spin-dependent constructive interference leads to a reduction in the GH displacement of the total reflected light field, while spin-dependent destructive interference results in an increase in the GH displacement of the total reflected light field.

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Section: Introductionmentioning

confidence: 99%

Interference effect on Goos–Hänchen shifts of anisotropic medium interface

Li,

Chen,

et al. 2023

New J. Phys.

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“…[19,20] Meanwhile, the off-diagonal components of the dielectric constant tensor emerge because of the magnetic field, resulting in the existence of the cross-polarized reflection and transmission coefficients. [21] Recently, numerous optical phenomena in WSM based systems have been discussed, such as adjustable Goos-Hänchen shift, [22,23] large Kerr and Faraday effects, [21,24] anomalous Hall effects, [25][26][27] etc. Nevertheless, to our knowledge, these works about the enhanced reflected IF shift mainly restrict the co-polarized reflection coefficient |r pp | by exciting the Brewster effect.…”

Section: Introductionmentioning

confidence: 99%

Enhanced and tunable Imbert-Fedorov shift based on epsilon-near-zero response of Weyl semimetal

Wu¹,

Xiang²,

Dai³

2023

Chinese Phys. B

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We theoretically investigate the reflected spatial Imbert-Fedorov (IF) shift of transverse-electric (TE)-polarized beam illuminating on a bulk Weyl semimetal (WSM). The spatial IF shift is enhanced significantly at two different frequencies close to the epsilon-near-zero (ENZ) frequency, where large values of reflection coefficients |r pp |/|r ss | are obtained due to the ENZ response induced different rapid increasing trends of |r pp | and |r ss |. Particularly, the tunable ENZ effect with tilt degree of Weyl cones and Fermi energy enables the enhanced spatial IF shift at different frequencies. The enhanced spatial IF shift also shows the adjustability of WSM thickness, incident angle and Weyl node separation. Our findings provide easy and available methods to enlarge and adjust the reflected IF shift of TE-polarized light with a WSM.

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“…[3,5] Because of their excellent performance in micro-nano optics and device technology, these two phenomena have aroused wide interest of researchers. They used several materials to improve the spatial shifts of reflected light beam on the material surface, starting with the original work on isotropic and anisotropic mediums, such as the polar crystal, [9] photonic crystals, [8,10] metamaterials, [11] metasurfaces, [12] topological material, [13] magnetic media, [14] and quasibound states in the continuum. [15,16] When facing a small GH shift and IF shift, the quantum weak measurement can be used to detect this phenomenon veraciously, since it uses the precise measurement of the physical parameters of the material, such as dielectric function and permeability.…”

Section: Introductionmentioning

confidence: 99%

Large spatial shifts of reflected light beam off biaxial hyperbolic materials

Shen 沈,

Bakhtiar 哈,

Song 宋

et al. 2023

Chinese Phys. B

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Many optical systems that deal with polarization rely on the adaptability of controlling light reflection in the lithography-free nanostructure. In this study, we explored the Goos-Hänchen (GH) and Imbert-Fedorov (IF) shifts at a biaxial hyperbolic film on a uniaxial hyperbolic substrate. This research statistically analyzed and calculated the GH and IF shifts for the natural biaxial hyperbolic material (NBHM). We selected the surface with the strongest anisotropy within the NBHM and obtained the complex beam-shift spectra. By incorporating the NBHM film, the GH shift caused by a transversely magnetic incident-beam on the surface is significantly enhanced compared to that on the uniaxial hyperbolic material. The maximum of GH shift can reach 86λ 0 at about 841 cm-1 when the thickness of NBHM is 90 nm, and the IF shift can approach 2.7λ 0 for a circularly-polarized beam incident on a NBHM of 1700 nm. An increase in spatial-shift was found when a highly anisotropic hyperbolic polariton is excited in hyperbolic materials, where the shift spectra exhibits an oscillating behaviour along with sharp shift peaks (steep slopes). This large spatial shift may provide an alternative strategy to develop novel sub-micrometric optical devices and biosensors.

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Goos–Hänchen and Imbert–Fedorov shifts in tiltedWeyl semimetals

Cited by 3 publications

References 40 publications

Interference effect on Goos–Hänchen shifts of anisotropic medium interface

Interference effect on Goos–Hänchen shifts of anisotropic medium interface

Enhanced and tunable Imbert-Fedorov shift based on epsilon-near-zero response of Weyl semimetal

Large spatial shifts of reflected light beam off biaxial hyperbolic materials

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