Magneto-optics articles within Nature Communications

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  • Article
    | Open Access

    Here, the authors perform Faraday rotation spectroscopy around the excitonic transitions in hBN-encapsulated WSe2 and MoSe2 monolayers, and interlayer excitons in MoS2 bilayers. They measure a large Verdet constant - 1.9 × 107 deg T−¹cm−¹ for monolayers, and attribute it to the giant oscillator strength and high g-factor of the excitons.

    • Benjamin Carey
    • , Nils Kolja Wessling
    •  & Ashish Arora

  • Article
    | Open Access

    The researchers showcase swept-coded aperture real-time femtophotography—an all-optical single-shot computational imaging modality at up to 156.3 trillion frames per second—video-records transient absorption in a semiconductor and ultrafast demagnetization of a metal alloy.

    • Jingdan Liu
    • , Miguel Marquez
    •  & Jinyang Liang

  • Article
    | Open Access

    Here the authors propose an isotropic three-dimensional metamaterial with nonreciprocal magnetoelectric resonant responses at visible and mid-infrared frequencies. The proposed metamaterials do not require external magnetization.

    • Shadi Safaei Jazi
    • , Ihar Faniayeu
    •  & Viktar Asadchy

  • Article
    | Open Access

    The authors provide an experimental demonstration of magnetic field generation in graphene disks via the inverse Faraday effect. When the disks are illuminated with circularly polarized radiation in resonance with the graphene plasmon frequency, the corresponding rotational motion of the charge carriers gives rise to a unipolar magnetic field.

    • Jeong Woo Han
    • , Pavlo Sai
    •  & Martin Mittendorff

  • Article
    | Open Access

    In the magneto-optical Kerr effect, light incident on a magnetic material is reflected with a shifted polarization, the size of the shift characterized by the Kerr angle. Here, Kato et al introduce a topological magneto-optical Kerr effect, where the presence of skyrmions, a type of topological spin texture, leads to a significant enhancement of the Kerr signal.

    • Yoshihiro D. Kato
    • , Yoshihiro Okamura
    •  & Youtarou Takahashi

  • Article
    | Open Access

    The microscopic origin and valley physics of quantum emitters (QEs) in 2D semiconductors are still not fully understood. Here, the authors report an anomalous magneto-optical behaviour of QEs in WSe2 monolayers coupled to chiral plasmonic nanocavities, suggesting the absence of intrinsic valley symmetry of the emitters.

    • Longlong Yang
    • , Yu Yuan
    •  & Xiulai Xu

  • Article
    | Open Access

    Phonons are the collective excitations of the lattice of a material, and can, in the case of chiral phonons, carry angular momentum, allowing for strong coupling to the magnetic properties of the material. Here, Cui, Bostrom and co-authors observe chiral magnon polarons, the hybridized quasiparticles of chiral phonons and magnons, in the van der Waals antiferromagnet FePSe3.

    • Jun Cui
    • , Emil Viñas Boström
    •  & Qi Zhang

  • Article
    | Open Access

    Many recent studies have explored the response of magnetic systems to circularly polarised light. To achieve this, typically experiments use a birefringent crystal. Here, Yang et al show that any small error in the alignment of the crystal can result in a beam shift, and this shift can lead to spurious signals similar yet unrelated to the electron spin.

    • Haozhe Yang
    • , Eva Schmoranzerová
    •  & Ioan-Mihai Miron

  • Article
    | Open Access

    Understanding photo-physics giving rise to quantum beating oscillations in hybrid organic-inorganic perovskites aids their applications in spintronics and quantum information science. Here, authors demonstrate that quantum beatings observed in single crystal perovskite at cryogenic temperatures are originating from positive and negative trions.

    • Uyen N. Huynh
    • , Ye Liu
    •  & Z. Valy Vardeny

  • Article
    | Open Access

    Nonreciprocal devices are crucial in scientific research and practical applications at all frequencies. Here the authors demonstrate an integrated terahertz optical isolator based on the magneto-optical effect in a nonreciprocal resonator.

    • Shixing Yuan
    • , Liao Chen
    •  & Xinliang Zhang

  • Article
    | Open Access

    Mn3Sn is an anti-ferromagnetic material which displays a large magneto-optical Kerr effect, despite lacking a ferromagnetic moment. Here, the authors show that likewise, Mn3Sn, also presents a particularly large magneto-optical Voigt signal, with a negligible change in the quench time over a wide temperature range.

    • H. C. Zhao
    • , H. Xia
    •  & H. B. Zhao

  • Article
    | Open Access

    Spin damping plays a fundamental role in many areas of spintronics, however, it is typically assumed that damping is irrelevant for impulsive spin excitations due to their rapid timescale. Here, the authors demonstrate that damping leads to a large and immediate spin-canting in anti-ferromagnets.

    • Christian Tzschaschel
    • , Takuya Satoh
    •  & Manfred Fiebig

  • Article
    | Open Access

    Magneto-optic Kerr effect microscopy is useful for dynamic magnetic studies, but is limited by the weak magneto-optical activity. Here, the authors show that extreme anti-reflection result in a Kerr amplitude as large as 20° and enables real-time detection of sub-wavelength magnetic domain reversals.

    • Dongha Kim
    • , Young-Wan Oh
    •  & Min-Kyo Seo

  • Article
    | Open Access

    The authors fabricate and investigate the metasurface made of 2D iron-garnet subwavelength nanopillar array on a thin iron-garnet film. It exhibits high quality-factor resonances, leading to a multifold increase in light intensity modulation of the transmitted light with an advantage of P and S polarizations both sensitive to the medium magnetization.

    • Daria O. Ignatyeva
    • , Dolendra Karki
    •  & Vladimir I. Belotelov

  • Article
    | Open Access

    The role of the optical magnetic field is generally not considered at nonrelativistic light intensities. Here the authors show magneto-electric rectification, an optical nonlinear effect due to electric and magnetic field coupling, in a thin film of the organic semiconductor pentacene at non-relativistic intensities.

    • M. Tuan Trinh
    • , Gregory Smail
    •  & Stephen C. Rand

  • Article
    | Open Access

    The evidence of topological origin for the recently observed anomalous Hall effect remains elusive. Here, the authors report that the resonance of the optical Hall conductivity resulted from topological electronic structure gives rise to the large intrinsic anomalous Hall effect in the magnetic Weyl semimetal Co3Sn2S2.

    • Y. Okamura
    • , S. Minami
    •  & Y. Takahashi

  • Article
    | Open Access

    Excitons in various spin and valley configurations control the optical properties of ultrathin transition metal dichalcogenides. Here, the authors develop theoretical and experimental methods to determine the exciton g-factors for all possible spin-valley configurations of excitons in monolayer and bilayer WSe2, including valley-indirect excitons.

    • Jonathan Förste
    • , Nikita V. Tepliakov
    •  & Alexander Högele

  • Article
    | Open Access

    Most of the energy harvesting principles are realized in heated-continuously systems. Here, the authors present a concept of high-frequency energy harvesting where the dissipated heat in a sample excites resonant magnons in a ferromagnetic metal layer.

    • Michal Kobecki
    • , Alexey V. Scherbakov
    •  & Manfred Bayer

  • Article
    | Open Access

    Thin samples CrI3 exhibit a phase transition under an applied magnetic field from layered antiferromagnetism to ferromagnetism. Here the authors observe an associated abrupt change in the magneto-Raman spectra, illustrating the sensitivity of Raman spectra to magnetic ordering.

    • Amber McCreary
    • , Thuc T. Mai
    •  & Angela R. Hight Walker

  • Article
    | Open Access

    Although the possibility to use weak measurements for metrological purposes has long been known, its practicality and the effective potential advantage are debated. Here, the authors demonstrate a WM-based correlation spectroscopy technique allowing low-frequency fT-level magnetometry at room temperature.

    • Weizhi Qu
    • , Shenchao Jin
    •  & Yanhong Xiao

  • Article
    | Open Access

    It is known that torques can be exerted on spins in a ferromagnet (FM) layer when an in-plane electric current is injected into a heavy metal (HM) layer in contact with the FM layer. Here, the authors demonstrate that torques can be generated without the current injection by shining instead circularly polarized light on the HM.

    • Gyung-Min Choi
    • , Jung Hyun Oh
    •  & Hyun-Woo Lee

  • Article
    | Open Access

    The local Drude model predicts that, under certain conditions, surface plasmon polaritons at a metal-dielectric surface have a frequency range where only unidirectional propagation is supported. Here, the authors show that in more realistic non-local models surface plasmon polaritons exhibit bidirectional propagation for all frequencies.

    • Siddharth Buddhiraju
    • , Yu Shi
    •  & Shanhui Fan

  • Article
    | Open Access

    Magneto-optical effects in magnets are commonly attributed to the interplay between exchange splitting and spin-orbit coupling. Here, Feng et al. report a topological magneto-optical effect in non-coplanar antiferromagnets due to finite scalar spin chirality, without any reference to exchange splitting or spin-orbit coupling.

    • Wanxiang Feng
    • , Jan-Philipp Hanke
    •  & Yugui Yao

  • Article
    | Open Access

    Spin caloritronics offers advantages for the thermal management of spintronic devices. Here, the authors demonstrate that the direction of heat currents generated by spin-caloritronic phenomena can be changed by illuminating magnetic materials with visible light.

    • Jian Wang
    • , Yukiko K. Takahashi
    •  & Ken-ichi Uchida

  • Article
    | Open Access

    Understanding antiferromagnetic dynamics enables future information technologies, but the detection remains challenging. Here, the authors show the capability of tracking the three dimensional spin motions in YMnO3 by combining time resolved measurements of Faraday rotation and magneto-optical second harmonic generation.

    • Christian Tzschaschel
    • , Takuya Satoh
    •  & Manfred Fiebig

  • Article
    | Open Access

    Malz et al. show how electromagnetic driving leads to amplification of topological magnon edge states and thus a large steady-state magnon edge current. Their approach should yield experimental signatures of topological magnon edge states and has potential applications in magnon spintronics.

    • Daniel Malz
    • , Johannes Knolle
    •  & Andreas Nunnenkamp

  • Article
    | Open Access

    Spin-information transport or transfer is essential for spintronics applications and often relies on high purity and quality materials. Here, the authors report on the defect-tolerant solution-processed Ruddlesden–Popper halide perovskites, where a spin propagation length of 600 nm was achieved via spin funneling.

    • David Giovanni
    • , Jia Wei Melvin Lim
    •  & Tze Chien Sum

  • Article
    | Open Access

    Exploring the magnon and phonon coupling may enable high efficiency magnonic applications. Here the authors show the observation, understanding and control of the magnon–phonon interaction by studying the magneto-acoustic resonance modes of a single thin-film Ni nanomagnet.

    • Cassidy Berk
    • , Mike Jaris
    •  & Holger Schmidt

  • Article
    | Open Access

    The unique valley and spin texture of atomically thin transition metal dichalcogenides (TMDs) allows the observation of the valley Zeeman effect for neutral and charged excitons. Here, the authors unveil the underlying physics of the magneto-optical response and valley Zeeman splitting of trions in tungsten-based TMDs.

    • T. P. Lyons
    • , S. Dufferwiel
    •  & A. I. Tartakovskii

  • Article
    | Open Access

    The authors computationally and experimentally derive the selection rules on polarization, wavelengths, and magnetic damping for non-dissipative аll-optical magnetic recording with femtosecond laser pulses in Co-doped garnet film. The suggested approach is based on a multiple resonant pumping of localized d-electron transitions.

    • A. Stupakiewicz
    • , K. Szerenos
    •  & A. V. Kimel

  • Article
    | Open Access

    The high speed switching and energy efficiency nature grant all-optical switching (AOS) great potential for future photonic integrated spintronic devices. Here the authors demonstrate the combination of AOS and domain wall propagation in Pt/Co/Gd synthetic ferrimagnetic racetrack for applications in photonic memory technologies.

    • M. L. M. Lalieu
    • , R. Lavrijsen
    •  & B. Koopmans

  • Article
    | Open Access

    Nitrogen-vacancy (NV) centers in diamonds are used for quantum sensing but NV centers are not sensitive to parameters such as temperature, pressure and biomolecules. Here the authors propose a scheme based on a magnetic nanoparticle docked responsive hydrogel which acts as a transducer between the particles and the diamond.

    • Ting Zhang
    • , Gang-Qin Liu
    •  & Quan Li

  • Article
    | Open Access

    Current proposals suitable for experimental realization of topologically protected optical states rely on complicated structures or only operate in the microwave regime. Here, Pan et al. propose topological Dirac plasmons to be realized at infrared frequencies in a periodically patterned graphene monolayer, subject to a magnetic field of only 2 Tesla.

    • Deng Pan
    • , Rui Yu
    •  & F. Javier García de Abajo

  • Article
    | Open Access

    Light pulses can control magnetism in a material, and the effective creation of magnetic oscillations leads to spintronic devices with higher efficiency. Here, the authors increase the efficiency of magnon excitation by using a material in which orbital angular momenta are not quenched.

    • Takuya Satoh
    • , Ryugo Iida
    •  & B. A. Ivanov

  • Article
    | Open Access

    Optical switching of ferromagnets has attracted interest for use in ultrafast spintronics but the physical origin of the effect remains unclear. Here the authors determine the contributions of two proposed mechanisms, the inverse Faraday effect and optical spin-transfer torque.

    • Gyung-Min Choi
    • , André Schleife
    •  & David G. Cahill

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