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Keywords = Imbert-Fedorov shift

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14 pages, 3767 KB  
Article
Spatial Shifts of Reflected Light Beam on Hexagonal Boron Nitride/Alpha-Molybdenum Trioxide Structure
by Song Bai, Yubo Li, Xiaoyin Cui, Shufang Fu, Sheng Zhou, Xuanzhang Wang and Qiang Zhang
Materials 2024, 17(7), 1625; https://doi.org/10.3390/ma17071625 - 2 Apr 2024
Cited by 2 | Viewed by 1531
Abstract
This investigation focuses on the Goos–Hänchen (GH) and Imbert–Fedorov (IF) shifts on the surface of the uniaxial hyperbolic material hexagonal boron nitride (hBN) based on the biaxial hyperbolic material alpha-molybdenum (α-MoO3) trioxide structure, where the anisotropic axis of hBN is rotated [...] Read more.
This investigation focuses on the Goos–Hänchen (GH) and Imbert–Fedorov (IF) shifts on the surface of the uniaxial hyperbolic material hexagonal boron nitride (hBN) based on the biaxial hyperbolic material alpha-molybdenum (α-MoO3) trioxide structure, where the anisotropic axis of hBN is rotated by an angle with respect to the incident plane. The surface with the highest degree of anisotropy among the two crystals is selected in order to analyze and calculate the GH- and IF-shifts of the system, and obtain the complex beam-shift spectra. The addition of α-MoO3 substrate significantly amplified the GH shift on the system’s surface, as compared to silica substrate. With the p-polarization light incident, the GH shift can reach 381.76λ0 at about 759.82 cm−1, with the s-polarization light incident, the GH shift can reach 288.84λ0 at about 906.88 cm−1, and with the c-polarization light incident, the IF shift can reach 3.76λ0 at about 751.94 cm−1. The adjustment of the IF shift, both positive and negative, as well as its asymmetric nature, can be achieved by manipulating the left and right circular polarization light and torsion angle. The aforementioned intriguing phenomena offer novel insights for the advancement of sensor technology and optical encoder design. Full article
(This article belongs to the Special Issue Colloidal Quantum Dots for Nanophotonic Devices)
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13 pages, 2641 KB  
Article
Spin-Hall Effect of Cylindrical Vector Vortex Beams
by Xuyao Zhang, Shuo Wang, Jinhong Liu, Jinze Wu and Jinhong Li
Photonics 2023, 10(12), 1356; https://doi.org/10.3390/photonics10121356 - 8 Dec 2023
Cited by 2 | Viewed by 2010
Abstract
Spin-Hall effect (SHE) of light is one of the main manifestations of the spin-orbit interaction of photons, and has been extensively studied for optical beams with homogeneous polarization. Here, we present a theoretical study of the SHE of cylindrical vector vortex beams (CVVBs) [...] Read more.
Spin-Hall effect (SHE) of light is one of the main manifestations of the spin-orbit interaction of photons, and has been extensively studied for optical beams with homogeneous polarization. Here, we present a theoretical study of the SHE of cylindrical vector vortex beams (CVVBs) possessing inhomogeneous polarization. We derive the analytical expressions of the SHE of CVVBs reflected and refracted at a dielectric interface with radial and azimuthal polarization of incidence. The spin-dependent shifts of the SHE of light linearly depend on the topological charge of the CVVBs. In contrast to the conventional SHE of horizontally or vertically polarized beams, the SHE shifts of the CVVBs are asymmetrical when the topological charge is nonzero. This asymmetry results in the transverse Imbert–Fedorov (IF) shifts that are proportional to the topological charge. Furthermore, based on weak measurement, we propose an experimental scheme to enhance the SHE and related IF shifts with proper pre- and post-selection polarization states. Our results advance the study of the SHE of structured light and may find applications in SHE-based techniques such as precision measurement. Full article
(This article belongs to the Special Issue Emerging Topics in Structured Light)
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12 pages, 1895 KB  
Article
Photonic Spin Hall Effect: Contribution of Polarization Mixing Caused by Anisotropy
by Maxim Mazanov, Oleh Yermakov, Ilya Deriy, Osamu Takayama, Andrey Bogdanov and Andrei V. Lavrinenko
Quantum Rep. 2020, 2(4), 489-500; https://doi.org/10.3390/quantum2040034 - 23 Sep 2020
Cited by 29 | Viewed by 5284
Abstract
Spin-orbital interaction of light attracts much attention in nanophotonics opening new horizons for modern optical systems and devices. The photonic spin Hall effect or Imbert-Fedorov shift takes a special place among the variety of spin-orbital interaction phenomena. It exhibits as a polarization-dependent transverse [...] Read more.
Spin-orbital interaction of light attracts much attention in nanophotonics opening new horizons for modern optical systems and devices. The photonic spin Hall effect or Imbert-Fedorov shift takes a special place among the variety of spin-orbital interaction phenomena. It exhibits as a polarization-dependent transverse light shift usually observed in specular scattering of light at interfaces with anisotropic materials. Nevertheless, the effect of the polarization mixing caused by anisotropy on the Imbert-Fedorov shift is commonly underestimated. In this work, we demonstrate that polarization mixing contribution cannot be ignored for a broad range of optical systems. In particular, we show the dominant influence of the mixing term over the standard one for the polarized optical beam incident at a quarter-wave plate within the paraxial approximation. Moreover, our study reveals a novel contribution with extraordinary polarization dependence not observable within the simplified approach. We believe that these results advance the understanding of photonic spin Hall effect and open new opportunities for spin-dependent optical phenomena. Full article
(This article belongs to the Special Issue Spin Hall Effect in Photonic Materials)
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