Degree of polarization
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A Measure of Polarization on Social Media Networks Based on Community Boundaries Open
Polarization in social media networks is a fact in several scenarios such as political debates and other contexts such as same-sex marriage, abortion and gun control. Understanding and quantifying polarization is a long-term challenge to r…
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Underwater Image Recovery Under the Nonuniform Optical Field Based on Polarimetric Imaging Open
The underwater imaging could be severely degraded by the scattering media due the backscatter veiling and signal attenuation. Image recovery based on polarization information has shown its efficiency in improving the quality of image in sc…
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Dark excitons and the elusive valley polarization in transition metal dichalcogenides Open
A rate equation model for the dark and bright excitons kinetics is proposed\nwhich explains the wide variation in the observed degree of circular\npolarization of the PL emission in different TMDs monolayers. Our work suggests\nthat the da…
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Intrinsic valley polarization and anomalous valley hall effect in single-layer 2H-FeCl2 Open
Valley, as a new degree of freedom for electrons, has drawn considerable attention due to its significant potential for encoding and storing information. Lifting the energy degeneracy to achieve valley polarization is necessary for realizi…
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FAST Observations of FRB 20220912A: Burst Properties and Polarization Characteristics Open
We report the observations of FRB 20220912A using the Five-hundred-meter Aperture Spherical radio Telescope. We conducted 17 observations totaling 8.67 hr and detected a total of 1076 bursts with an event rate up to 390 hr −1 . The cumulat…
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The X-Ray Polarization View of Mrk 421 in an Average Flux State as Observed by the Imaging X-Ray Polarimetry Explorer Open
Particle acceleration mechanisms in supermassive black hole jets, such as shock acceleration, magnetic reconnection, and turbulence, are expected to have observable signatures in the multiwavelength polarization properties of blazars. The …
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POLAMI: Polarimetric Monitoring of Active Galactic Nuclei at Millimetre Wavelengths – III. Characterization of total flux density and polarization variability of relativistic jets Open
We report on the first results of the POLAMI program, a simultaneous 3.5 and\n1.3mm full-Stokes-polarisation monitoring of a sample of 36 of the brightest\nactive galactic nuclei in the northern sky with the IRAM 30m Telescope. Through\na …
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Study of Sea Fog Environment Polarization Transmission Characteristics Open
Sea fog is a particular kind of atmospheric aerosol that often poses hidden risks to ship navigation, ocean exploration, human productivity, and life. In light of the aforementioned issues, this research conducted a thorough investigation …
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Dust Polarization toward Embedded Protostars in Ophiuchus with ALMA. III. Survey Overview Open
We present 0.″25 resolution (35 au) ALMA 1.3 mm dust polarization observations for 37 young stellar objects (YSOs) in the Ophiuchus molecular cloud. These data encompass all the embedded protostars in the cloud and several flat-spectrum an…
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Polarization of neutron star surface emission: a systematic analysis Open
New-generation X-ray polarimeters currently under development promise to open a new window in the study of high-energy astrophysical sources. Among them, neutron stars (NSs) appear particularly suited for polarization measurements. Radiati…
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Enhancing Visibility of Polarimetric Underwater Image by Transmittance Correction Open
Underwater vision can be severely degraded by the scattering media due to backscatter veiling and signal attenuation. In this paper, we focus on the case that the polarization effect of the object could not be neglected, and we propose a m…
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Novel robust skylight compass method based on full-sky polarization imaging under harsh conditions Open
A novel method based on Pulse Coupled Neural Network(PCNN) algorithm for the highly accurate and robust compass information calculation from the polarized skylight imaging is proposed,which showed good accuracy and reliability especially u…
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Enhancement of underwater vision by fully exploiting the polarization information from the Stokes vector Open
Underwater imaging method based on polarization information is extremely popular due to its ability to effectively remove the backscattered light. The Stokes vector contains the information of both the degree and angle of polarization of t…
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Strain dependence on polarization properties of AlGaN and AlGaN-based ultraviolet lasers grown on AlN substrates Open
Since the band ordering in AlGaN has a profound effect on the performance of UVC light emitting diodes (LEDs) and even determines the feasibility of surface emitting lasers, the polarization properties of emitted light from c-oriented AlGa…
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Polarized x-rays from a magnetar Open
Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magne…
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Polarized X-Rays from Windy Accretion in Cygnus X-1 Open
Recent X-ray polarimetric data on the prototypical black hole X-ray binary Cyg X-1 from the Imaging X-ray Polarimetry Explorer present tight constraints on accretion geometry in the hard spectral state. Contrary to general expectations of …
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Broad-band, radio spectro-polarimetric study of 100 radiative-mode and jet-mode AGN Open
We present the results from a broadband (1 to 3 GHz), spectro-polarimetry\nstudy of the integrated emission from 100 extragalactic radio sources with the\nATCA, selected to be highly linearly polarized at 1.4 GHz. We use a general\npurpose…
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Large circular dichroism in the emission from an incandescent metasurface Open
Compact sources in the mid-wave infrared (MWIR) are needed for applications ranging from spectroscopy to free-space communication. Ultrathin incandescent metasurfaces are promising candidates, offering the possibility to tune the emission …
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Generation and propagation of a vector cosine-Gaussian correlated beam with radial polarization Open
Scalar cosine-Gaussian-correlated Schell-model (CGCSM) beams of circular or rectangular symmetry were introduced just recently. In this paper, a new kind of partially coherent vector beam named vector CGCSM beam with radial polarization (i…
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Polarized scattered light from self-luminous exoplanets Open
\n Context. Direct imaging has paved the way for atmospheric characterization of young and self-luminous gas giants. Scattering in a horizontally-inhomogeneous atmosphere causes the disk-integrated polarization of the thermal radiation to …
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The RINGO2 and DIPOL optical polarization catalogue of blazars Open
We present ~2000 polarimetric and ~3000 photometric observations of 15\ngamma-ray bright blazars over a period of 936 days (11/10/2008 - 26/10/2012)\nusing data from the Tuorla blazar monitoring program (KVA DIPOL) and Liverpool\nTelescope…
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The Depolarization Performances of the Polarized Light in Different Scattering Media Systems Open
In this paper, with the aids of the Monte Carlo simulations, we have investigated the depolarization performances of circularly polarized light (CPL) and linearly polarized light (LPL) transmitted in homogeneous scattering media systems. T…
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POLAMI: Polarimetric Monitoring of Active Galactic Nuclei at Millimetre Wavelengths – II. Widespread circular polarization Open
We analyse the circular polarisation data accumulated in the first 7 years of\nthe POLAMI project introduced in an accompanying paper (Agudo et al.). In the\n3mm wavelength band, we acquired more than 2600 observations, and all but one\nof…
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FAST Observations of an Extremely Active Episode of FRB 20201124A. III. Polarimetry Open
As the third paper in the multiple-part series, we report the statistical properties of radio bursts detected from the repeating fast radio burst (FRB) source FRB 20201124A with the Five-hundred-meter Aperture Spherical radio Telescope dur…
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The X-Ray Polarimetry View of the Accreting Pulsar Cen X-3 Open
The first X-ray pulsar, Cen X-3, was discovered 50 yr ago. Radiation from such objects is expected to be highly polarized due to birefringence of plasma and vacuum associated with propagation of photons in the presence of the strong magnet…
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Partially coherent radially polarized fractional vortex beam Open
A new kind of partially coherent vector beam, named a partially coherent radially polarized fractional vortex (PCRPFV) beam, is introduced as a natural extension of the recently introduced scalar partially coherent fractional vortex beams …
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The X-ray polarization of the Seyfert 1 galaxy IC 4329A Open
We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for ∼500 ks, supported by XMM–Newton (∼60 ks) and NuSTAR (∼80 ks) exposures. We dete…
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Second-order statistics of a radially polarized cosine-Gaussian correlated Schell-model beam in anisotropic turbulence Open
Recently, we introduced a new class of radially polarized cosine-Gaussian correlated Schell-model (CGCSM) beams of rectangular symmetry based on the partially coherent electromagnetic theory [Opt. Express23, 33099 (2015)]. In this paper, w…
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Geometric descriptions for the polarization of nonparaxial light: a tutorial Open
This tutorial provides an overview of the local description of polarization for nonparaxial light, for which all Cartesian components of the electric field are significant. The polarization of light at each point is characterized by a thre…
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Self-steering partially coherent vector beams Open
We introduce a class of self-steering partially coherent vector optical beams with the aid of a generalized complex Gaussian representation. We show that such partially coherent vector beams have mobile guiding centers of their intensity a…