Spin Hall effect of light in metallic reflection

Hermosa, Nathaniel; Nugrowati, A. M.; Aiello, Andrea; Woerdman, J. P.

doi:10.1364/ol.36.003200

Cited by 89 publications

(53 citation statements)

References 22 publications

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“…3e and i, which originate from the splitting of the σ + and σ -components. In comparison with the PSHE on the interface between two conventional dielectrics, [9][10][11] there is an increase in the displacement of splitting owing to the inhomogeneity of the spin-orbit coupling system. 21 Moreover, through tailoring the inhomogeneity to present the twisting feature, the phenomenon of PSHE is enhanced and the number of the splitting states is not limited to two.…”

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confidence: 94%

“…8 Therefore, the photonic systems can be alternative choices for designing spin-based devices, thus raising an increasing research interest. 7,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] The liquid crystal (LC) is a special state of certain matter that is intermediate between the crystalline solid and the amorphous liquid. 24 Owing to its unique optical properties, the LC has been widely used for liquid crystal display and changes our daily life.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring the photon spin via light–matter interaction in liquid-crystal-based twisting structures

Ming

Chen

et al. 2017

npj Quant Mater

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We demonstrate the photonic spin Hall effect in a system comprising designable liquid crystal materials. The photoalignment technique provides an effective approach to control the directors of the liquid crystal molecules. Twisting structures with different transverse distributions are conveniently introduced into the liquid crystal plates for tailoring the spin-orbit coupling process to present various photonic spin Hall effect phenomena. The light-matter interaction in the twisting mediums is described with a Schrödinger-like equation. The photonic spin Hall effect considered in the study is explained as the result of an effective magnetic field acting on a pseudospin. Moreover, owing to the designability of the liquid crystal system, it is a potential platform for Hamiltonian engineering. Several valuable multiple quantum systems are possible to be presented in classical analogies.npj Quantum Materials (2017) 2:6 ; doi:10.1038/s41535-017-0011-1 INTRODUCTIONSpintronics becomes an attractive field of condensed matters in recent years and shows its immense potential in quantum information applications.1, 2 Various spintronic devices have been demonstrated to play important roles in quantum information processing and quantum computation.3, 4 The central theme of spintronics is manipulation of the spin degrees of freedom. The spin Hall effect (SHE) provides an effective approach for controlling the electron spin, and a large number of interesting investigations have been demonstrated. 5,6 Although considerable progress has been made, the electronic systems always face the problem of decoherence and decay. 7 In this aspect, the photonic quantum system has obvious advantages. Moreover, the photon is also an ideal spin carrier. The discovery of photonic spin Hall effect (PSHE) provides a powerful approach for controlling and manipulating the spin photons.8 Therefore, the photonic systems can be alternative choices for designing spin-based devices, thus raising an increasing research interest.

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confidence: 94%

Section: Introductionmentioning

confidence: 99%

Tailoring the photon spin via light–matter interaction in liquid-crystal-based twisting structures

Ming

Chen

et al. 2017

npj Quant Mater

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“…The magnitude of the shift is generally quite small. However, for reflection from metal surfaces shifts of the order of wavelength have been reported [9]. The metallic gratings even yield larger result [8] due to excitation of surface plasmons.…”

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confidence: 99%

“…Several experiments have confirmed the existence of the effect [5][6][7][8][9][10]. The simplest version of the effect is known as Federov-Imbert effect [11][12][13] and is seen prominently as a polarization dependent transverse shift on the reflected beam at a dielectric interface.…”

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confidence: 99%

Highly nonparaxial spin Hall effect and its enhancement by plasmonic structures

Agarwal

Biehs

2013

Opt. Lett.

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We show the existence of a very large spin Hall effect of light (SHEL) in single photon plasmonics based on spontaneous emission and the dipole-dipole interaction initiated energy transfer (FRET) on plasmonic platforms. The spin orbit coupling inherent in Maxwell equations is seen in the conversion of σ + photon to σ − photon. The FRET is mediated by the resonant surface plasmons and hence we find very large SHEL. We present explicit results for SHEL on both graphene and metal films. We also study how the splitting of the surface plasmon on a metal film affects the SHEL. In contrast to most other works which deal with SHEL as correction to the paraxial results, we consider SHEL in the near field of dipoles which are far from paraxial.In recent years the SHEL has attracted considerable attention [1][2][3][4]. Several experiments have confirmed the existence of the effect [5][6][7][8][9][10]. The simplest version of the effect is known as Federov-Imbert effect [11][12][13] and is seen prominently as a polarization dependent transverse shift on the reflected beam at a dielectric interface. The shift occurs relative to the prediction of geometrical optics. The light beam is known to carry both orbital and spin angular momentum [14,15] and the spin-orbit coupling is inherent in the vectorial Maxwell equations. When light travels across the interface between the two dielectrics then the orbital angular momentum changes which then implies change in the polarization so that the total angular momentum is conserved [16]. The magnitude of the shift is generally quite small. However, for reflection from metal surfaces shifts of the order of wavelength have been reported [9]. The metallic gratings even yield larger result [8] due to excitation of surface plasmons. The SHEL appears in a variety of other ways [2,5,7].Motivated by the recent progress in the observation of very large enhancement in spontaneous emission [17][18][19][20][21][22][23][24], we propose the existence of giant SHEL in single photon plasmonics. Especially fabricated plasmonic structures (PS) [25,26] have been shown to be especially suitable for enhancement of fluorescence. We consider the Förster energy transfer [27,28] between two atoms located on a plasmonic surface. The energy transfer is mediated by plasmons. The SHEL arises as we demonstrate as a clear conversion of a, say, σ + photon into a σ − photon which is absorbed by the second atom leading to preparation of the second atom in a state which is orthogonally polarized to the state of the atom which produced the photon in the first place. The conversion is accompanied by the generation of the two units of orbital angular momentum. The giant SHEL can be detected by monitoring the population of the orthogonally polarized excited state of the second atom. We trace the existence of the effect to the fact that the dipole field is far from a paraxial field and in fact contains all the Fourier components including the evanescent waves. It has been shown that the image of a dipole in far field is displac...

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“…In principle, this weak measurement technique employs two appropriate pre-and post-selection states to achieve an enhancement shift. In considerable amount of measurements, the pre-and postselection processes are implemented by using two nearly crossed Glan-Taylor polarizers (GTPs) [5][6][7][9][10][11][12], of which we can choose the optimal pre-and post-selection to acquire the maximum weak value [17]. Nevertheless, Kong et al present an effective solution consisting of two polarizers with an angle of 45 • to measure the SHEL around the Brewster angle [18,19].…”

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Optimized weak measurement for spatial spin-dependent shifts at Brewster angle

Zhang

Liu

et al. 2016

Appl. Phys. B

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presented as the Goos-Hänchen (GH) shift [1]. The out-ofplane one is also well known as Imbert-Fedorov (IF) shift [2], which performs as the out-of-plane spin-dependent shift (SDS) of the barycenter of circularly polarized beam. Based on the IF shift, an intriguing dynamic behavior, the separation of right-handed (RH) and left-handed (LH) circularly polarized components of the incident beam, can be observed for a linearly polarized beam with bounded width [3,4]. This phenomenon can be considered as a photonic analog of the electric spin Hall effect occurring in solidstate systems, generally named spin Hall effect of light (SHEL) [5,6]. Furthermore, these two kinds of shifts can be presented in spatial and angular domains (see, e.g., [7] and the references therein for a review).More generally, the magnitude of the SDSs is only on the nanoscale and is hard to achieve accurate measurement. In 2008, Hosten et al. firstly introduced the weak measurement technique to precisely characterize the tiny out-of-plane SDS associated with SHEL [5,8]. This unique method allows significant magnification of beam shifts and paves a useful way to observe this SDS and GH shift in optical reflection [9-15] and identify the polarization chirality of light beam [16]. In principle, this weak measurement technique employs two appropriate pre-and post-selection states to achieve an enhancement shift. In considerable amount of measurements, the pre-and postselection processes are implemented by using two nearly crossed Glan-Taylor polarizers (GTPs) [5][6][7][9][10][11][12], of which we can choose the optimal pre-and post-selection to acquire the maximum weak value [17]. Nevertheless, Kong et al. present an effective solution consisting of two polarizers with an angle of 45 • to measure the SHEL around the Brewster angle [18,19]. In the past few years, it has aroused considerable amount of investigations to manipulate the magnitude and direction of spin splitting [19][20][21][22][23][24] Abstract As Brewster law goes, the polarization selectivity when a light beam reflected at Brewster angle is feasible. We find that this polarization selectivity is still effective incorporated with weak measurement. So we realize an optimized weak measurement technique without preselection polarizer. This scheme is exploited to observe the spatial spin-dependent shifts when a linearly polarized beam is reflected at Brewster angle. The theoretical and experimental results show that by changing the polarization orientation of incident beam, the in-plane spin-dependent shift direction can be reversed, while the out-of-plane spindependent shift direction keeps unchanged. Our results may enrich the application of weak measurement.

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Spin Hall effect of light in metallic reflection

Cited by 89 publications

References 22 publications

Tailoring the photon spin via light–matter interaction in liquid-crystal-based twisting structures

Tailoring the photon spin via light–matter interaction in liquid-crystal-based twisting structures

Highly nonparaxial spin Hall effect and its enhancement by plasmonic structures

Optimized weak measurement for spatial spin-dependent shifts at Brewster angle

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