scholarly journals Observation and Modeling of Anomalous CN Polarization Profiles Produced by the Molecular Paschen-Back Effect in Sunspots

2005 ◽  
Vol 623 (1) ◽  
pp. L57-L61 ◽  
Author(s):  
A. Asensio Ramos ◽  
J. Trujillo Bueno ◽  
M. Collados
Keyword(s):  
Polarization Profiles

scholarly journals Wave propagation in pulsar magnetospheres

2012 ◽  
Vol 8 (S291) ◽  
pp. 540-542
Author(s):  
Chen Wang ◽  
Dong Lai ◽  
Jinlin Han
Keyword(s):  
Radio Waves ◽  
Plasma Parameters ◽  
Electron Positron ◽  
Transfer Equations ◽  
Propagation Effects ◽  
Consistent Manner ◽  
Physical Effects ◽  
Field Lines ◽  
Polarization Profiles ◽  
The Magnetic Field

AbstractWe study the propagation effects of radio waves in a pulsar magnetosphere, composed of relativistic electron-positron pair plasmas streaming along the magnetic field lines and corotating with the pulsar. We critically examine the various physical effects that can potentially influence the observed wave intensity and polarization. We numerically integrate the transfer equations for wave polarization in the rotating magnetosphere, taking account of all the propagation effects in a self-consistent manner. For typical magnetospheric plasma parameters produced by pair cascade, we find that the observed radio intensity and polarization profiles can be strongly modified by the propagation effects. Some applications of our results are discussed.

Recent advances in optical metasurfaces for polarization detection and engineered polarization profiles

Nanophotonics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 1003-1014 ◽  
Author(s):  
Yuttana Intaravanne ◽  
Xianzhong Chen
Keyword(s):  
Optical Communications ◽  
Light Propagation ◽  
Optical Elements ◽  
Fundamental Physics ◽  
Fundamental Properties ◽  
Research Fields ◽  
Quantum Science ◽  
Polarization Profiles ◽  
Polarization Detection ◽  
A Current

AbstractLike amplitude, phase and frequency, polarization is one of the fundamental properties of light, which can be used to record, process and store information. Optical metasurfaces are ultrathin inhomogeneous media with planar nanostructures that can manipulate the optical properties of light at the subwavelength scale, which have become a current subject of intense research due to the desirable control of light propagation. The unprecedented capability of optical metasurfaces in the manipulation of the light’s polarization at subwavelength resolution has provided an unusual approach for polarization detection and arbitrary manipulation of polarization profiles. A compact metasurface platform has been demonstrated to detect polarization information of a light beam and to arbitrarily engineer a polarization profile that is very difficult or impossible to realize with conventional optical elements. This review will focus on the recent progress on ultrathin metasurface devices for polarization detection and realization of customized polarization profiles. Optical metasurfaces have provided new opportunities for polarization detection and manipulation, which can facilitate real-world deployment of polarization-related devices and systems in various research fields, including sensing, imaging, encryption, optical communications, quantum science, and fundamental physics.

scholarly journals Multi-Level Information Storage Using Engineered Electromechanical Resonances of Piezoelectric Wafers: A Concept Piezoelectric Quick Response (PQR) Code

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6344
Author(s):  
Christopher Hakoda ◽  
Eric S. Davis ◽  
Cristian Pantea ◽  
Vamshi Krishna Chillara
Keyword(s):  
Information Storage ◽  
Cumulative Number ◽  
Quick Response ◽  
Multiple Frequency ◽  
Potential Applications ◽  
Level Information ◽  
Multi Level ◽  
Storage Technologies ◽  
Piezoelectric Wafers ◽  
Polarization Profiles

A piezoelectric-based method for information storage is presented. It involves engineering the polarization profiles of multiple piezoelectric wafers to enhance/suppress specific electromechanical resonances. These enhanced/suppressed resonances can be used to represent multiple frequency-dependent bits, thus enabling multi-level information storage. This multi-level information storage is demonstrated by achieving three information states for a ternary encoding. Using the three information states, we present an approach to encode and decode information from a 2-by-3 array of piezoelectric wafers that we refer to as a concept Piezoelectric Quick Response (PQR) code. The scaling relation between the number of wafers used and the cumulative number of information states that can be achieved with the proposed methodology is briefly discussed. Potential applications of this methodology include tamper-evident devices, embedded product tags in manufacturing/inventory tracking, and additional layers of security with existing information storage technologies.

scholarly journals Polarization in Pulsar Radio Emission

1992 ◽  
Vol 128 ◽  
pp. 384-386
Author(s):  
D. M. GOULD
Keyword(s):  
Radio Emission ◽  
Circular Polarization ◽  
Linear Polarization ◽  
Large Data ◽  
Position Angle ◽  
Published Data ◽  
Data Set ◽  
Pulsar Radio ◽  
Polarization Profiles ◽  
Pulsar Radio Emission

Polarimetric observations of over 300 pulsars have been carried out between 21 December 1988 and 22 January 1990 at 606, 610, 925, and 1408 MHz using the Lovell Telescope at Jodrell Bank. Many of these pulsars have no previously published polarization profiles and will be published shortly (Gould and Lyne 1990). This large data set along with previously published data from various sources, has been used to test the correlation found by Radhakrishnan and Rankin (1990) between sense reversing circular polarization signatures and the accompanying sense of rotation of the linear polarization position angle.

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