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We develop a theory of the magneto-optical and magneto-electric properties of a topological insulator thin film in the presence of a quantizing external magnetic field. We find that low-frequency magneto-optical properties depend only on…

介观与纳米尺度物理 · 物理学 2015-05-20 Wang-Kong Tse , A. H. MacDonald

We present a method for a precise determination of magnetic anisotropy and anisotropy of quadratic magneto-optical response of thin films of ferromagnetic and ferrimagnetic materials. The method is based on measurements of a magneto-optical…

Magneto-optic Kerr effect (MOKE) is a powerful probe of broken time-reversal symmetry ($\mathcal{T}$), typically used to study ferromagnets. While MOKE has been observed in some antiferromagnets (AFMs) with vanishing magnetization, it is…

材料科学 · 物理学 2026-01-08 V. Sunko , S. Ahsanullah , V. Jain , S. Weber , S. Kumaran , J. -Q. Yan , J. Orenstein , D. Ovchinnikov

Using density functional theory calculations, we have found an enhanced magneto-optical Kerr effect in Fe/insulator interfaces. The results of our study indicate that interfacial Fe atoms in the Fe films have a low-dimensional nature, which…

材料科学 · 物理学 2017-12-20 Bo Gu , Saburo Takahashi , Sadamichi Maekawa

Recent advances in nanophotonics have demonstrated that various optical resonances in nanostructures can achieve strong field confinement with substantially suppressed scattering. This study investigates the optical Kerr effect (OKE)…

光学 · 物理学 2025-10-10 Andrey V. Panov

High index dielectric nanoantennas excited at Mie-type resonances have exhibited enormous enhancement of optical nonlinearity. Such nanostructures have been actively studied by researchers in the last years. The present work provides the…

光学 · 物理学 2020-07-10 Andrey V. Panov

By means of magneto-optical Kerr effect we observe spin reorientations from in-plane to out-of-plane and vice versa upon annealing thin Fe films on Ag(001) at increasing temperatures. Scanning tunneling microscopy images of the different Fe…

材料科学 · 物理学 2009-10-31 D. M. Schaller , D. E. Buergler , C. M. Schmidt , F. Meisinger , H. -J. Guentherodt

In magnetoplasmonics, it is possible to tailor the magneto-optical properties of nanostructures by exciting surface plasmon polaritons (SPPs). Thus far, magnetoplasmonic effects have been considered static. Here, we describe ultrafast…

We propose a nonlinear orbital magnetoelectric effect, which generates orbital magnetization quadratically in centrosymmetric materials where the linear orbital magnetoelectric effect is strictly forbidden. Using extended semiclassical…

介观与纳米尺度物理 · 物理学 2026-05-19 Jinxiong Jia , Zhenhua Qiao , Jian Wang

We have observed optical birefringence in liquids induced by single-cycle THz pulses with field strengths exceeding 100 kV/cm. The induced change in polarization is proportional to the square of the THz electric field. The time-dependent…

其他凝聚态物理 · 物理学 2015-05-13 Matthias C. Hoffmann , Nathaniel C. Brandt , Harold Y. Hwang , Ka-Lo Yeh , Keith A. Nelson

We report a joint theoretical and experimental study focused on understanding the optical and magneto-optical properties of Co-based full-Heusler compounds. We show that magneto-optical spectra calculated within ab-initio density functional…

材料科学 · 物理学 2009-11-13 F. Ricci , S. Picozzi , A. Continenza , F. D'Orazio , F. Lucari , K. Westerholt , M. Kim , A. J. Freeman

The asymmetric magnetization reversal in exchange biased Fe/MnF$_{2}$ involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here experimentally tested…

材料科学 · 物理学 2016-08-16 A. Tillmanns , S. Oertker , B. Beschoten , G. Güntherodt , C. Leighton , Ivan K. Schuller , J. Nogues

The magneto-optical properties of (Ga,Mn)As have been determined within density functional theory using the highly precise full-potential linear augmented plane wave (FLAPW) method. A detailed investigation of the electronic and magnetic…

材料科学 · 物理学 2011-12-30 A. Stroppa , S. Picozzi , A. Continenza , M. Y. Kim , A. J. Freeman

The magneto-optic Kerr effect is a powerful tool for measuring magnetism in thin films at microscopic scales, as was recently demonstrated by the major role it played in the discovery of two-dimensional (2D) ferromagnetism in monolayer…

介观与纳米尺度物理 · 物理学 2021-03-25 Freddie Hendriks , Marcos H. D. Guimarães

We propose a novel chiral order parameter to explain the unusual polar Kerr effect in underdoped cuprates. It is based on the loop-current model by Varma, which is characterized by the in-plane anapole moment N and exhibits the…

超导电性 · 物理学 2013-07-26 Sergey S. Pershoguba , Kostyantyn Kechedzhi , Victor M. Yakovenko

We report the large polar magnetooptical Kerr effect in L10-MnxGa epitaxial films with giant perpendicular magnetic anisotropy in a wide composition range. The Kerr rotation was enhanced by a factor of up to 10 by decreasing Mn atomic…

材料科学 · 物理学 2016-11-15 L. J. Zhu , L. Brandt , J. H. Zhao , G. Woltersdorf

We use weakly nonlinear geometric optics to study a model for the DC Kerr effect (the Kerr electro-optic effect), in which a light beam propagating through a material with strong nonlinear optical properties can have its polarization…

偏微分方程分析 · 数学 2025-05-05 Nikolas Eptaminitakis , Plamen Stefanov

In this paper, we construct complex metric structures on complex hypersurfaces in hyperkahler manifolds. This construction is that in contact geometry.

微分几何 · 数学 2015-11-04 Mitsuhiro Imada

The influence of surface plasmons on the magneto-optic activity in a two-dimensional hexagonal array is addressed. The experiments were performed using hexagonal array of circular holes in a ferromagnetic Ni film. Well pronounced troughs…

The nonlinear magneto-optical Kerr-effect (NOLIMOKE) is determined for freestanding Fe monolayers with several in-plane structures from first principles. Based on the theory of nonlinear magneto-optics by H\"ubner and Bennemann [Phys. Rev.…

材料科学 · 物理学 2009-10-31 J. P. Dewitz , W. Hübner