Effects of surface plasmons on spin currents in a thin film system

Oue, Daigo; Matsuo, Mamoru

doi:10.1088/1367-2630/ab764c

Cited by 16 publications

(16 citation statements)

References 28 publications

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“…Especially interesting manifestations of the specific DC-distribution details predicted in this paper can be expected in combination with the external or SPP-induced static fields, for example, the SPP-induced magnetization [20][21][22][23]. In particular, the nanoscale variations of the energy and momentum distributions may influence the spin transport processes [41][42][43], induce additional features of the light-matter interaction in presence of high-gradient local optical fields [44], etc.…”

Section: Discussionmentioning

confidence: 87%

“…In the example of Fig. 4 the "phenomenological" step AB is reduced to because the electric and magnetic fields are continuous ( 1 = 1, see (42) and ( 62)). Besides, Eq.…”

Section: Electric Polarization Of the Mediummentioning

confidence: 99%

“…Fig.7. SPP momentum constituents calculated for the conditions(42),(43): Complete spin and orbital momenta and their material ingredients. (Blue) complete "field" momentum (32) (for x > 0); (green) orbital "field" momentum (27) (for x > 0); (red) spin "field" momentum (30) (for x > 0); (brown) complete orbital momentum (91); (black) complete spin momentum (92); (cyan) orbital material momenum (89); (light-green) spin material momentum (90); (magenta) spin material contribution (88) (the same as in Fig.6); (yellow) "residual" spin momentum (94); (grey) energy density (58) multiplied by (k s /) according to(26).…”

mentioning

confidence: 99%

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Microscopic analysis of the energy, momentum, and spin distributions in a surface plasmon-polariton wave

Bekshaev¹,

Angelsky

Zheng

et al. 2021

Opt. Mater. Express

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Our subject is an electromagnetic field near the plane interface dividing a conductive and a dielectric media, under conditions supporting the surface plasmon-polariton (SPP) propagation. The conductive medium is described by the hydrodynamic electron-gas model which enables a consistent analysis of the field-induced variations of the electron density and velocity at the interface and its nearest vicinity. The distributions of electromagnetic dynamical characteristics: energy, energy flow, spin and momentum are calculated analytically and illustrated numerically, employing the silver-vacuum interface as an example. A set of the "field" and material contributions to the energy, spin and momentum are explicitly identified in respect to their physical origins, and the orbital (canonical) and spin (Belinfante) momentum constituents are separately examined. In this context, a procedure for the spin-orbital momentum decomposition in presence of free charges is proposed and substantiated. The microscopic results agree with the known phenomenological data but additionally show specific nanoscale structures in the near-interface behavior of the SPP energy and momentum which can be deliberately created, controlled and used in nanotechnology applications.

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Section: Discussionmentioning

confidence: 87%

“…In the example of Fig. 4 the "phenomenological" step AB is reduced to because the electric and magnetic fields are continuous ( 1 = 1, see (42) and ( 62)). Besides, Eq.…”

Section: Electric Polarization Of the Mediummentioning

confidence: 99%

mentioning

confidence: 99%

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Microscopic analysis of the energy, momentum, and spin distributions in a surface plasmon-polariton wave

Bekshaev¹,

Angelsky

Zheng

et al. 2021

Opt. Mater. Express

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“…The dipolar interaction has been studied in magnetism for many decades, but the analogy with the spin-orbit interaction in creating chirality was emphasized only recently. Recently, many theoretical predictions and experimental discoveries of chiral interactions among magnetic [47][48][49][50][51][52][53][54][55][56][57][58], photonic [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73], phononic [74][75][76][77][78][79][80][81][82], electronic [83], and plasmonic [84][85][86][87][88][89] excitations in spintronics are revealed, which are found to mediate the excitation of quasiparticles into a single direction, leading to phenomena such as chiral spin pumping [50], chiral spin Seebeck [50], chiral phonon pumping by magnetization dynamics [74], magnon diodes <...…”

Section: Chirality As Generalized Spin-orbit Interactionmentioning

confidence: 99%

“…As reviewed in Sec. 5.2, SPPs can generate electronic spin currents in normal metals [84][85][86][87]89].…”

Section: Surface Plasmon Polaritonsmentioning

confidence: 99%

Chirality as Generalized Spin-Orbit Interaction in Spintronics

Chen¹,

Luo²,

Bauer³

2022

Preprint

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Chirality or handedness is a digital relation between three vectors that distinguishes an object from its mirror image, such as the spread fingers of the right and left hand. The chirality of ground state magnetic textures defined by the vectors of magnetization, its gradient, and an electric field from broken inversion symmetry can be fixed by a strong relativistic spin-orbit interaction. This review focuses on the chirality observed in the excited states of the magnetic order, dielectrics, and conductors that hold transverse spins when they are evanescent. Even without any relativistic effect, the transverse spin of the evanescent waves are locked to the momentum and the surface normal of their propagation plane. This chirality thereby acts as a generalized spin-orbit interaction, which leads to the discovery of various chiral interactions between magnetic, phononic, electronic, photonic, and plasmonic excitations in spintronics that mediate the excitation of quasiparticles into a single direction, leading to phenomena such as chiral spin and phonon pumping, chiral spin Seebeck, spin skin, magnonic trap, magnon Doppler, and spin diode effects. Intriguing analogies with electric counterparts in the nano-optics and plasmonics exist. After a brief review of the concepts of chirality that characterize the ground state chiral magnetic textures and chirally coupled magnets in spintronics, we turn to the chiral phenomena of excited states. We present a unified electrodynamic picture for dynamical chirality in spintronics in terms of generalized spin-orbit interaction and compare it with that in nano-optics and plasmonics. Based on the general theory, we subsequently review the theoretical progress and experimental evidence of chiral interaction, as well as the near-field transfer of the transverse spins, between various excitations in magnetic, photonic, electronic and phononic nanostructures at GHz time scales. We provide a perspective for future research before concluding this article.

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