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We investigate the magnetic field in an intermediate-velocity filament for which the H$\alpha$ intensity in the WHAM survey correlates with excess Faraday rotation of extragalactic radio sources over the length of the filament from b ~ 20…

星系天体物理 · 物理学 2016-08-17 Jeroen M. Stil , Athena Hryhoriw

The first direct measurements of effective magnetic diffusivity in turbulent flow of electro-conductive fluids (the so-called beta-effect) under magnetic Reynolds number Rm >> 1 are reported. The measurements are performed in a…

流体动力学 · 物理学 2015-05-20 Peter Frick , Vitaliy Noskov , Sergey Denisov , Rodion Stepanov

All-optical pump-probe detection of magnetization precession has been performed for ferromagnetic EuO thin films at 10 K. We demonstrate that the circularly-polarized light can be used to control the magnetization precession on an ultrafast…

材料科学 · 物理学 2015-06-05 T. Makino , F. Liu , T. Yamasaki , Y. Kozuka , K. Ueno , A. Tsukazaki , T. Fukumura , Y. Kong , M. Kawasaki

A modification of the Drude dispersive model based on fractional time derivative is presented. The dielectric susceptibility is calculated analytically and simulated numerically, showing a good agreement between theoretical description and…

计算物理 · 物理学 2021-03-23 Karol Karpiński , Sylwia Zielińska - Raczyńska , David Ziemkiewicz

We report on the melting dynamics of frozen olive oil in quiescent water for Rayleigh numbers up to $10^9$. The density difference results in an upward buoyancy-driven flow of liquid oil forming a thin film around the frozen oil. We…

流体动力学 · 物理学 2024-11-20 Pim Waasdorp , Aron H. van den Bogaard , Leen van Wijngaarden , Sander G. Huisman

We predict a strong-field ultrafast optical Faraday effect, where a circularly polarized ultrashort optical pulse induces transient chirality in an achiral transparent dielectric. This effect is attractive for time-resolved measurements…

其他凝聚态物理 · 物理学 2017-12-13 Michael S. Wismer , Mark I. Stockman , Vladislav S. Yakovlev

We consider a linearly polarized electromagnetic wave incident on an opaque screen with square aperture of edge a. An application of Faraday's law to a loop parallel to the screen, on the side away from the source, shows that the wave must…

光学 · 物理学 2009-11-06 Max S. Zolotorev , Kirk T. McDonald

We report non-invasive detection of spin coherence in a collection of Raman-driven cold atoms using dispersive Faraday rotation fluctuation measurements, which opens up new possibilities of probing spin correlations in quantum gases and…

量子气体 · 物理学 2021-04-22 Maheswar Swar , Dibyendu Roy , Subhajit Bhar , Sanjukta Roy , Saptarishi Chaudhuri

We have completed a measurement of the $(6s^26p^2)\, ^3\!P_0 \rightarrow \, ^3\!P_2$ 939 nm electric quadrupole ($E2$) transition amplitude in atomic lead. Using a Faraday rotation spectroscopy technique and a sensitive polarimeter, we have…

Rotation of the plane of the polarization of light in the presence of a magnetic-field, known as the Faraday rotation, is a consequence of the electromagnetic nature of light and has been utilized in many optical devices. Current efforts…

光学 · 物理学 2020-03-31 Vasileios Balos , Genaro Bierhance , Martin Wolf , Mohsen Sajadi

The inverse Faraday effect induced in magnetic films by ultrashort laser pulses allows excitation and control of spins at GHz and sub-THz frequencies. Frequency of the excited magnetization precession is easily tunable by the external…

We show that the Faraday effect can be derived from a simple two-state model. This approach uses a quantized electromagnetic field and does not make reference to differences in refractive indices of left- and right-circularly polarized…

量子物理 · 物理学 2024-10-04 Benjamin W. Butler

Faraday rotation of radio source polarization provides a measure of the integrated magnetic field along the observational lines of sight. We compare a new, large sample of Faraday rotation measures (RMs) of polarized extragalactic sources…

天体物理学 · 物理学 2009-11-13 Yongzhong Xu , Philipp P. Kronberg , Salman Habib , Quentin W. Dufton

We report the detection of variable linear polarization from Sgr A* at a wavelength of 3.5mm, the longest wavelength yet at which a detection has been made. The mean polarization is 2.1 +/- 0.1% at a position angle of 16 +/- 2 deg with rms…

We measure the velocities of the mean flows which are driven by curved rolls in a pattern formation system. Curved rolls in Faraday waves are generated in experimental cells consisting of channels with varying widths. The mean flow…

斑图形成与孤子 · 物理学 2007-05-23 Peilong Chen

Approximating the frequency dispersion of the permittivity of materials with simple analytical functions is of fundamental importance for understanding and modeling their optical properties. Quite generally, the permittivity can be treated…

光学 · 物理学 2017-05-16 Hame S Sehmi , Wolfgang Langbein , Egor A Muljarov

A novel comparative technique enabling measurement of the magnetic susceptibility of diamagnetic liquids with the "Moses effect" is presented. The technique is based on the experimental establishment of the deformation of the liquid/vapor…

应用物理 · 物理学 2023-03-22 David Shulman , Meir Lewkowicz , Edward Bormashenko

A convenient and general decomposition of the photon self-energy in a magnetized, but otherwise isotropic, medium is given in terms of the minimal set of tensors consistent with the transversality condition. As we show, the self-energy in…

高能物理 - 唯象学 · 物理学 2009-11-07 Juan Carlos D'Olivo , Jose F. Nieves , Sarira Sahu

Faraday rotation is a fundamental magneto-optical phenomenon used in various optical control and magnetic field sensing techniques. Recently, it was shown that a giant Faraday rotation can be achieved in the low-THz regime by a single…

光学 · 物理学 2012-12-07 Arya Fallahi , Julien Perruisseau-Carrier

We extend the rotation measure work of Burn (1966) to the cases of limited sampling of lambda squared space and non-constant emission spectra. We introduce the rotation measure transfer function (RMTF), which is an excellent predictor of…

天体物理学 · 物理学 2009-11-13 M. A. Brentjens , A. G. de Bruyn