Scattering properties of electromagnetic waves in a multilayered cylinder filled with double negative and positive materials

Radio Science ◽  
2007 ◽  
Vol 42 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Hai-Ying Yao ◽  
Le-Wei Li ◽  
Cheng-Wei Qiu ◽  
Qun Wu ◽  
Zhi-Ning Chen
Keyword(s):  
Electromagnetic Waves ◽  
Double Negative ◽  
Multilayered Cylinder ◽  
Positive Materials

Negative refraction of plane electromagnetic waves in non-uniform double-negative media

2019 ◽  
Vol 44 (5) ◽  
pp. 1125 ◽  
Author(s):  
L. A. Pazynin ◽  
V. L. Pazynin ◽  
H. O. Sliusarenko
Keyword(s):  
Electromagnetic Waves ◽  
Negative Refraction ◽  
Double Negative

scholarly journals Properties of the Band Gaps in 1D Ternary Lossy Photonic Crystal Containing Double-Negative Materials

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Alireza Aghajamali ◽  
Maryam Akbarimoosavi ◽  
Mahmood Barati
Keyword(s):  
Incidence Angle ◽  
Band Gaps ◽  
Angle Of Incidence ◽  
Double Negative ◽  
Double Positive ◽  
One Dimensional ◽  
Binary Structure ◽  
Negative Materials ◽  
The One ◽  
Positive Materials

Theoretically, the characteristics matrix method is employed to investigate and compare the properties of the band gaps of the one-dimensional ternary and binary lossy photonic crystals which are composed of double-negative and double-positive materials. This study shows that by varying the angle of incidence, the band gaps for TM and TE waves behave differently in both ternary and binary lossy structures. The results demonstrate that, by increasing the angle of incidence for the TE wave, the width and the depth of zero-n¯, zero-μ, and Bragg gap increase in both ternary and binary structures. On the other hand, the enhancement of the angle of incidence for the TM wave contributes to reduction of the width and the depth of the zero-n¯ and Bragg gaps, and they finally disappear for incidence angles greater than 50° and 60° for the binary structure and 40° and 45° for the ternary structures, respectively. In addition, the details of the edges of the band gaps variations as a function of incidence angle for both structures are studied.

LINEAR ELECTRO-OPTICAL EFFECT ON DPS-DNG LAYERED STRUCTURE

2009 ◽  
Vol 23 (15) ◽  
pp. 3205-3211 ◽  
Author(s):  
J. H. SHAHBAZIAN ◽  
A. S. KARAKASHIAN
Keyword(s):  
Electric Field ◽  
Layered Structure ◽  
Electromagnetic Waves ◽  
Index Of Refraction ◽  
Double Negative ◽  
Reflection Spectra ◽  
Optical Effect ◽  
Double Positive ◽  
Negative Index Of Refraction ◽  
Positive Index

In this letter, the influence of an applied electric field on a periodic structure composed of alternating layers of DPS (Double Positive index of refraction) and DNG (Double Negative index of refraction) has been studied. We present theoretical and numerical results of our investigation of the reflection spectra of the visible waves on this structure in the presence of an electric field which will cause redistribution of charges and will modify the index of refraction of materials and enable us to control the phase and/or intensity of propagating electromagnetic waves.

scholarly journals Designing a One-Dimensional Photonic Crystal via Thue-Morse Sequence Containing Two Types of Double Negative Metamaterial

2021 ◽  
Author(s):  
Ali Baseri ◽  
Alireza Keshavarz
Keyword(s):  
Photonic Crystal ◽  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Electromagnetic Waves ◽  
Incidence Angle ◽  
Band Gaps ◽  
Double Negative ◽  
One Dimensional ◽  
Periodic Arrangement

Abstract This study investigates the propagating of electromagnetic waves through a one-dimensional quasi-photonic crystal with the transfer matrix method. Our proposed structure consists of two types of double negative metamaterials, organized according to the Thue-Morse sequence law. The results show that changing the structure via quasi-periodic arrangements makes the outcome more varied than applying the absolute periodic arrangement. Given that, our desirable results of interest are more conveniently achieved. The structure completely stops-both s and p polarization at the lower frequencies, for all incidence angles. It also partially stops s and p polarization, at higher frequencies. Moreover, the achieved transmittance spectrum contains several omnidirectional band-gaps, which remain invariant with changes in the incidence angle. The oscillation of the transmittance values also becomes more intense at higher orders of the period number. This study could pave the way for optimizing of photonic crystal circuits, splitters, switches, etc.

Seti Space Missions

1997 ◽  
Vol 161 ◽  
pp. 761-776 ◽  
Author(s):  
Claudio Maccone
Keyword(s):  
Electromagnetic Waves ◽  
Space Missions ◽  
Gravitational Lens ◽  
The Sun ◽  
Space Antenna ◽  
Focal Distance ◽  
Large Space ◽  
The Earth ◽  
Space Antennas ◽  
New Space

AbstractSETI from space is currently envisaged in three ways: i) by large space antennas orbiting the Earth that could be used for both VLBI and SETI (VSOP and RadioAstron missions), ii) by a radiotelescope inside the Saha far side Moon crater and an Earth-link antenna on the Mare Smythii near side plain. Such SETIMOON mission would require no astronaut work since a Tether, deployed in Moon orbit until the two antennas landed softly, would also be the cable connecting them. Alternatively, a data relay satellite orbiting the Earth-Moon Lagrangian pointL2would avoid the Earthlink antenna, iii) by a large space antenna put at the foci of the Sun gravitational lens: 1) for electromagnetic waves, the minimal focal distance is 550 Astronomical Units (AU) or 14 times beyond Pluto. One could use the huge radio magnifications of sources aligned to the Sun and spacecraft; 2) for gravitational waves and neutrinos, the focus lies between 22.45 and 29.59 AU (Uranus and Neptune orbits), with a flight time of less than 30 years. Two new space missions, of SETI interest if ET’s use neutrinos for communications, are proposed.

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