Generation of spin currents by surface plasmon resonance

Uchida, K.; Adachi, Hiroto; Kikuchi, Daisuke; Ito, Shun; Qiu, Zhiyong; Maekawa, Sadamichi; Saitoh, Eiji

doi:10.1038/ncomms6910

Cited by 63 publications

(52 citation statements)

References 39 publications

(60 reference statements)

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“…Configuration 1 leads to excitation of evanescent counter-rotating spin waves, in addition to the two traveling quasispin and quasielastic waves. The evanescent waves are not important for energy transport but play significant roles in other phenomena, such as transients in pulsed excitation or evanescent-wave mediated coupling between two media [29].…”

Section: Discussionmentioning

confidence: 99%

Coherent elastic excitation of spin waves

et al. 2015

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We model the injection of elastic waves into a ferromagnetic film (F) by a nonmagnetic transducer (N). We compare the configurations in which the magnetization is normal and parallel to the wave propagation. The lack of axial symmetry in the former results in the emergence of evanescent interface states. We compute the energy-flux transmission across the N|F interface and sound-induced magnetization dynamics in the ferromagnet. We predict efficient acoustically induced pumping of spin current into a metal contact attached to F.

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Section: Discussionmentioning

confidence: 99%

Coherent elastic excitation of spin waves

et al. 2015

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“…Another scheme is to utilize optospintronic methods with plasmon resonances proposed in Ref. [43]. The underling idea is to apply a spatially modulated circularly polarized laser to a multiferroic magnet (Fig.…”

Section: (D) We See That Hvmentioning

confidence: 99%

Laser-Driven Multiferroics and Ultrafast Spin Current Generation

2016

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We propose an ultrafast way to generate spin chirality and spin current in a class of multiferroic magnets using a terahertz circularly polarized laser. Using the Floquet formalism for periodically driven systems, we show that it is possible to dynamically control the Dzyaloshinskii-Moriya interaction in materials with magnetoelectric coupling. This is supported by numerical calculations, by which additional resonant phenomena are found. Specifically, when a static magnetic field is applied in addition to the circularly polarized laser, a large resonant enhancement of spin chirality is observed resembling the electron spin resonance. Spin current is generated when the laser is spatially modulated by chiral plasmonic structures and could be detected using optospintronic devices. DOI: 10.1103/PhysRevLett.117.147202 Introduction.-Control of emergent collective phenomena by external fields is an important problem in condensed matter. Multiferroic magnets (for a review, see Refs. [1][2][3]) are opening new possibilities in this direction since the local spins are coupled not only to magnetic fields but to electric fields through the magnetoelectric (ME) coupling. Laser control of materials is attracting interest with a goal of realizing ultrafast and noncontact manipulation [4][5][6][7][8][9][10][11][12][13][14]. In the research community of magnetic systems, control of magnetism using a laser is being studied in the context of spin-pumping and spintronics [4][5][6][7]. On the other hand, in the field of electronic systems, periodically driven quantum systems draw the interest of many researchers. When the Hamiltonian is time periodic, the system can be described by the so-called Floquet states [15,16], a temporal analog of the Bloch states, and it is possible to control their quantum nature. For noninteracting systems, the control of the band topology has been studied theoretically [8][9][10] and experimentally [13,14]. It is possible to understand the effect of a laser through a mapping from the time-dependent Hamiltonian to a static effective Hamiltonian using the Floquet theory, and the change of quantum state, e.g., topology and symmetry, is attributed to the emergent terms in the static effective Hamiltonian. This framework can also be applied to quantum magnets. Laser-induced magnetization growth in general quantum magnets [17,18] as well as laser-driven topological spin states [18,19], a quantum spin versions of Floquet topological insulators, were proposed recently.In the current work, we apply the Floquet theory to quantum multiferroics and study the synthetic interactions appearing in the effective Floquet Hamiltonian

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“…[55] Wettability is an important property of am ateriala ssociated with surface polarity. [60][61][62][63][64] Light induced alteration of wettability has been thoroughly studied for the purpose of liquid motion on flat solid surfaces driven by the wettability changes upon light isomerization of azobenzenes, [63] spiropyrans [64] or rotaxanes. [62] Wettability of the polymer 385 was evaluated by measuring of the water contact angle,w ith ad ecrease from 838 to 748 caused by the hydrophobicity of the DASA.…”

Section: Donor-acceptor Stenhouse Adducts (Dasa)mentioning

confidence: 99%

Synthesis and Applications of Stenhouse Salts and Derivatives

Gomes

Coelho

Afonso

2018

Chemistry A European J

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In recent years, Stenhouse salts have attracted much attention as intermediates for the synthesis of cyclopenten-2-enones. This Minireview aims to present an overview of the methods for preparation, further transformation and applications of Stenhouse and Stenhouse-like salts. In this context, the Piancatelli rearrangement and its variants, and the recently reported donor-acceptor Stenhouse salts (DASA) will be addressed. The photophysical properties of DASA and its applications in colorimetric detection of amines, functionalization of polymers for detection of heat and nerve agents, photolithography and orthogonal photoswitching systems are discussed.

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Generation of spin currents by surface plasmon resonance

Cited by 63 publications

References 39 publications

Coherent elastic excitation of spin waves

Coherent elastic excitation of spin waves

Laser-Driven Multiferroics and Ultrafast Spin Current Generation

Synthesis and Applications of Stenhouse Salts and Derivatives

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