نتایج جستجو برای: element circularly polarized

تعداد نتایج: 240627  

Journal: :Optics express 2013
Arthur R Davoyan Ahmed M Mahmoud Nader Engheta

We suggest a principle for isolation of circularly polarized waves in magnetically active extreme-parameter metamaterials. Using theoretical analysis and numerical simulations, we show that metamaterials with extreme parameters, such as epsilon-near-zero materials (ENZ), when merged with magneto-optical materials, become transparent for forward circularly polarized waves of a given handedness a...

1999
R. Mittra

In this paper, we demonstrate that the trefoil knot has the unique property that its forward scattering for circularly polarized wa ̈es exhibits a strong dependence on the handedness of the polarization. Both a single knot element as well as an array of these knots show this ( ) property which could be used in a polarization-selectï e surface PSS . Q 1999 John Wiley & Sons, Inc. Microwave Opt Te...

Journal: :IEEE Transactions on Antennas and Propagation 2021

Waveguide slot arrays are a widely used solution to attain linearly polarized high-gain antennas. In this article, an all-metal T-shaped radiating element is conceived with the aim replace usual rectangular slots and circularly arrays, preserving their good properties. The polarization conversion made possible due inclusion of parasitic arm perpendicular main active slot. Due fact that second n...

Journal: :Optics express 2009
Jie Shan Jerry I Dadap Tony F Heinz

We have developed a general analytic description of polarized light pulses and explored the properties of circularly polarized single-cycle pulses. The temporal evolution of the electric-field vector of such spectrally broad pulses, which may be described in terms of a Hilbert transform relationship, differs significantly from the well-known behavior of quasi-monochromatic radiation. Single-cyc...

2006
Tom G. Mackay Akhlesh Lakhtakia

The phase velocity of plane waves propagating in an isotropic chiral medium can be simultaneously positive for left–circularly polarized light and negative for right–circularly polarized light (or vice versa). The constitutive parameter regimes supporting this phenomenon are established for nondissipative and dissipative mediums. The boundary between positive and negative phase velocity is char...

2010
Osman O. Ahsen Ugur Yilmaz Deniz Aksoy Gulay Ertas Ergin Atalar

A theory is presented to calculate the heat dissipation of a magnetic suspension, a ferrofluid, driven by circularly polarized magnetic field. Theory is tested by in vitro experiments and it is shown that, regardless of the character of the relaxation process, linearly and circularly polarized magnetic field excitations, having the same root-mean-square magnitude, are equivalent in terms of hea...

2012
S. Sumathi K. Gokulakrishnan K. B. Rajesh

We investigate the focused properties of circularly polarized beam by a high NA lens axicon based on vector diffraction theory. The Circularly polarized femtosecond laser vortex pulses ablate material differently depending on the handedness of light.This effect offers an additional degree of freedom to control the shape and size of laser-machined structures on a sub-wavelength scale.

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2003
Gadi Fibich Boaz Ilan

We present a systematic study of propagation of circularly polarized beams in a Kerr medium. In contrast to previous studies, vectorial effects (i.e., coupling to the axial component of the electric field and the grad-div term) and nonparaxiality are not neglected in the derivation. This leads to a system of equations that takes into account nonparaxiality, vectorial effects, and coupling to th...

2017
Jun Jiang Li Jiang Xia Wang Deng-Hong Zhang Chen-Zhong Dong

The dynamic dipole polarizabilities of the low-lying states of Ca for linearly and circularly polarized light are calculated by using relativistic configuration interaction plus core polarization (RCICP) approach. The magic wavelengths, at which the two levels of the transitions have the same ac Stark shifts, for 4s-4pj,m and 4s-3dj,m magnetic sublevels transitions are determined. The present m...

2013
Son Trinh-Van Han Byul Kim Gina Kwon Keum Cheol Hwang

In this paper, a novel circularly polarized Spidron fractal slot antenna array developed for broadband satellite communication in the Ku-band is discussed. A Spidron fractal slot configuration was utilized as a single radiating element to achieve circularly polarized radiation. The effects of altering the feeding position on the resonance behavior and the radiative characteristics were assessed...

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