نتایج جستجو برای: polarization analysis

تعداد نتایج: 2881229  

1997
M. Protopapas D. G. Lappas P. L. Knight

We present a numerical method for investigating the non-perturbative quantum mechanical interaction of light with atoms in two dimensions, without a basis expansion. This enables us to investigate intense laser-atom interactions with light of arbitrary polarization without approximation. Results are presented for the dependence of ionization and high harmonic generation on ellipticity seen in r...

2007
H. G. Wang H. Zhang X. H. Cui G. J. Qiao K. J. Lee Y. Liu R. X. Xu

The main idea and procedure are presented for a new synthetical method on constraining 3-D structure of emission regions of pulsars. With this method the emission regions can be synthetically constrained by fitting multi-wavelength observations features, e.g. pulse widths, phase offsets between radio pulse profiles and high energy light curves, and radio polarization properties. The main techni...

2010
S. Ramakrishna Paul A. J. Sherratt Anthony D. Dutoi Tamar Seideman

We address theoretically and numerically the possibility of observing ellipticity in high-order harmonic generation (HHG) from aligned molecules driven by linearly polarized fields—a subject of controversy in the recent literature with significant implications. To that end we develop a numerical method for solution of the electronic dynamics and extend a recently developed theory of HHG from al...

1996
K. E. Rangarajan

The effect of wave velocity on resonance line polarization is studied. We assumed a photosphere chromosphere type of temperature structure for the atmosphere with plane parallel symmetry. The ”Discrete Space Theory technique” to solve the polarized radiative transfer in the presence of velocity fields and under the assumption of Complete Redistribution mechanism is briefly described alongwith t...

2001
A. A. Babich P. Osland N. Paver

We discuss contact-interaction searches in the processes ee → μμ, bb̄ and cc̄ at an ee Linear Collider with c.m. energy √ s = 0.5 TeV and with longitudinally polarized beams. The measurement of polarized cross sections allows to study the individual helicity cross sections, and consequently to derive separate, model-independent, constraints on the four-fermion contact interaction couplings. We ev...

Journal: :Optics letters 1996
R C Tyan P C Sun A Scherer Y Fainman

We introduce a novel polarizing beam splitter that uses the anisotropic spectral reflectivity (ASR) characteristic of a high-spatial-frequency multilayer binary grating. Such ASR effects allow us to design an optical element that is transparent for TM polarization and reflective for TE polarization. For normally incident light our element acts as a polarization-selective mirror. The properties ...

Journal: :Optics letters 2012
D N Schimpf S Ramachandran

We demonstrate polarization-sensitive measurement of the modal content of waveguides by generalizing the classic rotating wave-plate-based polarimeter to wide-field optical low-coherence interferometry. The spatial phases of the modes are retrieved with principal component analysis. By applying this polarization-sensitive cross-correlation (C2) imaging technique to the characterization of a few...

Journal: :EURASIP J. Adv. Sig. Proc. 2007
Xiaofei Zhang Dazhuan Xu

This paper links the polarization-sensitive-array signal detection problem to the parallel factor (PARAFAC) model, which is an analysis tool rooted in psychometrics and chemometrics. Exploiting this link, it derives a deterministic PARAFAC signal detection algorithm. The proposed PARAFAC signal detection algorithm fully utilizes the polarization, spatial and temporal diversities, and supports s...

2012
David Dorn

We offer a unified analysis of the growth of low-skill service occupations between 1980 and 2005 and the concurrent polarization of US employment and wages. We hypothesize that polarization stems from the interaction between consumer preferences, which favor variety over specialization, and the falling cost of automating routine, codifiable job tasks. Applying a spatial equilibrium model, we co...

Journal: :Applied optics 2010
Luc Gendre Alban Foulonneau Laurent Bigué

In the field of polarimetry, ferroelectric liquid crystal cells are mostly used as bistable polarization rotators suitable to analyze crossed polarizations. This paper shows that, provided such a cell is used at its nominal wavelength and correctly driven, its behavior is close to that of a tunable half-wave plate, and it can be used with much benefit in lightweight imaging polarimetric setups....

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