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The propagation of polarized emission in pulsar magnetosphere is investigated in this paper. The polarized waves are generated through curvature radiation from the relativistic particles streaming along curved magnetic field lines and…

High Energy Astrophysical Phenomena · Physics 2015-06-19 P. F. Wang , C. Wang , J. L. Han

The Stokes V parameter characterizes asymmetry of amplitudes between right- and left-handed waves, and non-vanishing value of the V parameter yields a circularly polarized signal. Cosmologically, V parameter may be a direct probe for parity…

Astrophysics · Physics 2008-11-26 Naoki Seto , Atsushi Taruya

In this paper, a new generation of magnet-free circulators with high performance is proposed. Circulators are crucial devices in modern communication systems due to their ability to enable full-duplexing and double the spectral efficiency…

Signal Processing · Electrical Eng. & Systems 2020-02-19 Yao Yu , Giuseppe Michetti , Michele Pirro , Ahmed Kord , Dimitrios Sounas , Zhicheng Xiao , Cristian Cassella , Andrea Alu , Matteo Rinaldi

We present the electromagnetic model of a dual circular polarization antenna-feed system, consisting of a corrugated feedhorn, a polarizer and an orthomode transducer. This model was developed for the passive front-end implemented in the…

Instrumentation and Methods for Astrophysics · Physics 2019-05-22 S. Realini , C. Franceschet , A. Mennella

The polarization exchange effect in a twisted-nematic Fabry-P\'erot resonator is experimentally confirmed in the regimes of both uniform and electric-field-deformed twisted structures. The polarization of output light in the transmission…

Optical frequency combs, with precise control of repetition rate and carrier-envelope-offset frequency, have revolutionized many fields, such as fine optical spectroscopy, optical frequency standards, ultra-fast science research,…

Optics · Physics 2018-02-14 Y. Zhang , L. Yan , X. F. Zhang , L. Zhang , W. Han , W. Guo , H. Jiang , S. Zhang

Telescopes often modify the input polarization of a source so that the measured circular or linear output state of the optical signal can be signficantly different from the input. This mixing, or polarization "cross-talk", is defined by the…

Instrumentation and Methods for Astrophysics · Physics 2015-05-28 D. M. Harrington , J. R. Kuhn , S. Hall

Radiocommunication systems have evolved significantly in recent years in order to meet present and future demands. Historically, time, frequency and more recently, spatial dimensions have been used to improve capacity and robustness.…

Signal Processing · Electrical Eng. & Systems 2018-03-21 Pol Henarejos

To obtain full Stokes spectra in multi-wavelength windows simultaneously, we developed a new spectro-polarimeter on the Domeless Solar Telescope at Hida Observatory. The new polarimeter consists of a 60 cm aperture vacuum telescope on an…

Instrumentation and Methods for Astrophysics · Physics 2018-06-13 Tetsu Anan , Yu Wei Huang , Yoshikazu Nakatani , Kiyoshi Ichimoto , Satoru Ueno , Goichi Kimura , Shota Ninomiya , Sanetaka Okada , Naoki Kaneda

In this letter, a dual port antenna with polarization adjustability is proposed. The loading effect of four ring slots stimulates a hybrid mode in the antenna that generates eight magnetic monopoles with high gain in boresight. Due to…

Signal Processing · Electrical Eng. & Systems 2019-11-04 Peyman Aghabeyki , Masoud Hamidi , Gholamreza Moradi , Pedram Mousavi

Guided waves are the perfect carriers of electromagnetic signals in planar miniaturized devices due to their high localization and controlled propagation direction. However, it is still a challenge to control the polarization of propagating…

Classical Physics · Physics 2023-05-22 Syuzanna Asadulina , Andrey Bogdanov , Stanislav Glybovski , Oleh Yermakov

Following Kamionkowski (2008), a quadratic estimator of the rotation of the plane of polarization of the CMB is constructed. This statistic can estimate a spatially varying rotation angle. We use this estimator to quantify the prospects of…

Cosmology and Nongalactic Astrophysics · Physics 2009-08-03 Amit P. S. Yadav , Rahul Biswas , Meng Su , Matias Zaldarriaga

Polarization splitter-rotators (PSRs) are the key elements to realize on-chip polarization manipulation. Current PSRs on thin film lithium niobate (TFLN) rely on sub-micron gaps to realize modes separation, which increase the difficulties…

Optics · Physics 2024-02-26 Mengke Wang , Hao Yao , Jiayao Deng , Zhefeng Hu , Tingting Tang , Kaixin Chen

Liquid crystals allow for the real-time control of the polarization of light. We describe and provide some experimental examples of the types of general polarization transformations, including universal polarization transformations, that…

Optics · Physics 2018-05-14 Alicia Sit , Lambert Giner , Ebrahim Karimi , Jeff S. Lundeen

We observe the polarization squeezing in the mixture of a two mode squeezed vacuum and a simple coherent light through a linear polarization beam splitter. Squeezed vacuum not being squeezed in polarization, generates polarization squeezed…

Optics · Physics 2016-10-21 Namrata Shukla , Ranjana Prakash

The recently introduced 4D 64-ary polarisation-ring-switching format is investigated in dispersion-managed systems. Numerical simulations show a reach increase of $25\%$ with respect to PM-8QAM. This gain is achieved from the nonlinear…

Signal Processing · Electrical Eng. & Systems 2019-07-29 Bin Chen , Chigo Okonkwo , Hartmut Hafermann , Alex Alvarado

X-ray polarimetric measurements are based on studying the distribution of the directions of scattered photons or photoelectrons and on the search of a sinusoidal modulation with a period of {\pi}. We developed two tools for investigating…

Instrumentation and Methods for Astrophysics · Physics 2018-01-08 Enrico Massaro , Sergio Fabiani , Riccardo Campana , Enrico Costa , Ettore Del Monte , Fabio Muleri , Paolo Soffitta

We provide an analytic study of the dynamics of semiconductor lasers with injection (pump) of spin-polarized electrons, previously considered in the steady-state regime. Using complementary approaches of quasi-static and small signal…

Materials Science · Physics 2015-05-18 Jeongsu Lee , William Falls , Rafal Oszwaldowski , Igor Zutic

We show that circularly polarized femtosecond laser pulses produce field-free alignment in linear and planar molecules. We study the rotational wavepacket evolution of O$_2$ and benzene created by circularly polarized light. For benzene, we…

Chemical Physics · Physics 2014-06-06 C T L Smeenk , P B Corkum
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