Spin Current Generation by a Surface Plasmon Polariton

Wijaya, Theodorus Jonathan; Oue, Daigo; Matsuo, Mamoru; Ito, Yasutoshi; Elphick, Kelvin; Uchida, Hironaga; Inoue, M.; Hirohata, Atsufumi

doi:10.48550/arxiv.2004.12348

Cited by 2 publications

(8 citation statements)

References 15 publications

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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%

“…The plasmon polaritons confine light far beyond the wave length and thereby strongly enhance field amplitudes. Magneto-plasmonics addresses, for example, amplified magneto-optical effects [431,455], surface plasmon resonance in ferromagnetic metals [456], and the integration of plasmonics and spintronics [84][85][86][87]89]. Before addressing the spin-current generation by surface plasmon polariton, we address here the inverse Faraday effect, i.e., the dynamics generation of magnetization by light.…”

Section: Surface Plasmon Polariton and Electron Spinmentioning

confidence: 99%

“…Experiments.-References [84,89] reported experimental observation of spin current generation by surface plasmon resonance. The experiment [84] employs Au nanoparticles embedded in films composed by the paramagnetic Pt and ferrimagnetic BiY 2 Fe 5 O 12 layers, as illustrated in Fig.…”

Section: Spin Current Generation By Surface Plasmon Polaritonmentioning

confidence: 99%

“…However, recent measurement in Ref. [89] reported the direct spin-current generation by surface plasmon resonance in the absence of the magnons.…”

Section: Spin Current Generation By Surface Plasmon Polaritonmentioning

confidence: 99%

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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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