Spin splitting of reflected vortex-beam off hyperbolic-crystal surface

Song, Haoyuan; Wang, Xiang-Guang; Hao, Shaopeng; Fu, Shufang; Wang, Xuan-Zhang

doi:10.1016/j.optcom.2023.129603

Cited by 3 publications

(5 citation statements)

References 44 publications

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“…( 20), the spatial shifts of p-and s-incidences can be achieved, which will be reduced to the well-known result shown in Ref. [33].…”

Section: Theoretical Descriptionmentioning

confidence: 69%

“…The simple vortex beam is equal to the first-order Laguerre-Gaussian beam whose radial index is equal to zero and its envelope does not depend on the radial coordinate at all. The angular distribution of electric field is explicitly expressed by [33,36]…”

Section: Theoretical Descriptionmentioning

confidence: 99%

“…[31,32] Recently, Wang et al studied the spin splitting of vortex beams irradiated on semi-infinite uniaxial natural hBN. [33] It was found that the spin splitting is significant when the Brewster angle or critical angle is satisfied, and the spin splitting can be enhanced by intrinsic orbital angular momentum. In contrast to hBN, the anisotropy of α-MoO 3 films is stronger, which is attributed to their biaxial hyperbolic character.…”

Section: Introductionmentioning

confidence: 99%

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Spin splitting of vortex beams on the surface of natural biaxial hyperbolic materials

Liang 梁,

Song 宋,

Li 李

et al. 2023

Chinese Phys. B

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The spin splitting of vortex beam on the surface of biaxial natural hyperbolic materials (NHMs) rotated by an angle with respect to the incident plane is investigated, where an obvious asymmetry of spatial shifts produced by the left-handed circularly (LCP) component and right-handed circularly polarized (RCP) component is exhibited. We derived the analytical expression of in- and out-plane spatial shifts for each spin component of the vortex beam. The orientation angle of the optics axis plays a key role on the spin splitting between the two spin-components which can be reflected by the simple expressions for spatial shifts without the rotation angle. Based on a α-MoO3 biaxial NHM, the spatial shifts of the two spin components with the topological charge are investigated. As the topological charge increases, the spatial shifts also increase, in addition, a tiny spatial shift close to zero can be obtained if we control the incident frequency or the polarization of the reflected beams. It also can be concluded that the maximum of the spin splitting results from the LCP component at p-incidence and the RCP component at s-incidence in the RB-II. The effect of the incident angle and the thickness of α-MoO3 film on spin splitting also is considered. These results can be used for manipulating infrared radiation and optical detection.

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“…( 20), the spatial shifts of p-and s-incidences can be achieved, which will be reduced to the well-known result shown in Ref. [33].…”

Section: Theoretical Descriptionmentioning

confidence: 69%

Section: Theoretical Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spin splitting of vortex beams on the surface of natural biaxial hyperbolic materials

Liang 梁,

Song 宋,

Li 李

et al. 2023

Chinese Phys. B

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“…It is evident that the anisotropy of REGBs has a significant impact on the spatial shifts. Upon investigating the spatial shifts generated by Airy beams and vortex beams in previous studies [45,46], we find that the spatial shifts are considerably enhanced and modifiable through adjustment of the associated physical parameters. For instance, it has been confirmed that decay factors of Airy beams play a major role in spatial shifts [45].…”

Section: Resultsmentioning

confidence: 87%

“…For instance, it has been confirmed that decay factors of Airy beams play a major role in spatial shifts [45]. Furthermore, modifying the topological charges can greatly improve the spatial shifts for the vortex beams [46].…”

Section: Resultsmentioning

confidence: 96%

Spatial shifts of reflected rotating elliptical Gaussian beams from surface phonon polaritons in hyperbolic materials

Li,

Song,

Wang

et al. 2024

Phys. Scr.

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The effect of surface phonon polaritons (SPhPs) on Goos-Hänchen (GH) and Imbert-Fedorov (IF) shifts of reflected rotating elliptical Gaussian beams (REGBs) is investigated in the Otto configuration with a naturally hyperbolic material (NHM) substrate. The spatial shifts are enhanced significantly and adjusted by tuning the REGBs and the optical axis orientation of NHM. The magnitude of GH and IF shifts is easily evaluated by timing the elliptical parameter b02 on the basis of the spatial shift at b0=1.0 when η(=a0/b0)≥2.0. The attenuation total reflection (ATR) spectra are simulated for a hexagonal boron nitride (hBN) substrate. To better understand the impact of SPhPs on the GH and IF shifts, a dispersion equation for SPhPs is established. The features of GH and IF shifts around SPhPs can be observed through the frequency scanning along the dispersion curves at a fixed incident angle. The comparison between the ATR spectra and the dispersion curves demonstrates that the enhancement of GH and IF shifts with higher reflection always occurs in the reststrahlen bands (RBs) of NHM once SPhPs are excited. In RB-I, the magnitudes of GH and IF shifts attributable to the SPhPs are located between the peak and dip of a shift curve within a very narrow frequency region. However, in RB-II, the positive maximum values of GH and IF shifts just coincide with the SPhPs. As a result, it is predicted that a relatively large spatial shift will be observed along the frequency scanning line. The large shifts accompanied by the higher reflection may show potential applications in optical or optoelectronic technologies.

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Tunable spatial and angular spin splitting of reflected vortex-beam off hyperbolic metasurface

Zhang,

Li,

et al. 2024

Results in Physics

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Spin splitting of reflected vortex-beam off hyperbolic-crystal surface

Cited by 3 publications

References 44 publications

Spin splitting of vortex beams on the surface of natural biaxial hyperbolic materials

Spin splitting of vortex beams on the surface of natural biaxial hyperbolic materials

Spatial shifts of reflected rotating elliptical Gaussian beams from surface phonon polaritons in hyperbolic materials

Tunable spatial and angular spin splitting of reflected vortex-beam off hyperbolic metasurface

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