The role of terahertz surface plasmons in the scattering pattern of electromagnetic waves in an unstable elliptical plasma antenna

2017 ◽  
Vol 24 (7) ◽  
pp. 072112 ◽  
Author(s):  
S. Safari ◽  
B. Jazi
Keyword(s):  
Surface Plasmons ◽  
Electromagnetic Waves ◽  
Scattering Pattern ◽  
Plasma Antenna ◽  
Elliptical Plasma

REFLECTION COEFFICIENT OF AN ELECTROMAGNETIC WAVE IN CONDUCTIVE MEDIA

2018 ◽  
pp. 100-106
Author(s):  
M. S. Sudakova ◽  
M. L. Vladov ◽  
M. R. Sadurtdinov
Keyword(s):  
Reflection Coefficient ◽  
Ground Penetrating Radar ◽  
Electromagnetic Waves ◽  
Water Contamination ◽  
Survey Design ◽  
Direct And Inverse Problems ◽  
The Difference ◽  
Ground Penetrating ◽  
Ideal Dielectric

Within the ground penetrating radar bandwidth the medium is considered to be an ideal dielectric, which is not always true. Electromagnetic waves reflection coefficient conductivity dependence showed a significant role of the difference in conductivity in reflection strength. It was confirmed by physical modeling. Conductivity of geological media should be taken into account when solving direct and inverse problems, survey design planning, etc. Ground penetrating radar can be used to solve the problem of mapping of halocline or determine water contamination.

The role of physical factors in the complex therapy of patients with rheumatoid arthritis

1985 ◽  
Vol 66 (4) ◽  
pp. 318-318
Author(s):  
L. V. Chernetsova ◽  
A. G. Ibragimova
Keyword(s):  
Rheumatoid Arthritis ◽  
Comparative Analysis ◽  
Drug Therapy ◽  
Electromagnetic Waves ◽  
Physical Factors ◽  
Complex Therapy ◽  
Decimeter Range

The comparative analysis of treatment of 76 patients with rheumatoid arthritis using electromagnetic waves of the decimeter range and lithium electrophoresis, depending on the activity of the process and the type of drug therapy.

scholarly journals ANTITUMOR EFFECT OF ELECTROMAGNETIC FIELDS AND THEIR EFFECT ON PAIN IN EXPERIMENTAL AND CLINICAL ONCOLOGY

2019 ◽  
Vol 6 (2) ◽  
pp. 86-99 ◽  
Author(s):  
E. M. Frantsiyants ◽  
E. A. Sheiko
Keyword(s):  
Tumor Cells ◽  
Electromagnetic Fields ◽  
Analgesic Effect ◽  
Electromagnetic Waves ◽  
Antitumor Effect ◽  
Living Organism ◽  
Inhibitory Effect ◽  
Chemotherapeutic Agents ◽  
Scientific Publications

The review examined and analyzed scientific publications on the effect of electromagnetic fields (EMF) on various sys­tems of the human body and animals with tumors, as well as on pain in the experiment and the clinic. The theoretical foundations and practical results of the use of EMF in various modulations and modes in the goals and objectives of oncology, including how to optimize the process of anesthesia and correct the vital activity of the body's functional systems with a tumor, are consecrated. Information is given on possible physicochemical effects, features, and mecha­nisms of therapeutic influence at various levels of a living organism. The ability of electromagnetic waves to transfer in­formation both within a single biosystem and at the level of a whole living organism with a tumor is shown. Studies of combined action of EMF and chemotherapy were analyzed. It has been established that there are experimental prerequisites for using this factor in order to induce changes in the permeability of the membranes of tumor cells by in­creasing the internalization of chemotherapeutic agents and, thus, enhance the antitumor effect. The role of EMF in the induction of apoptosis in tumor cells is shown. It has been shown that chemotherapy together with electromagnetic fields induces apoptosis and has an inhibitory effect on DNA synthesis in osteosarcoma cells, breast cancer, colon cancer, melanoma and other tumors. The role of magnetic fields in order to enhance the analgesic effect was investigated. The analgesic effect is due to the cessation or weakening of nerve impulses from the painful focus due to the elimination of hypoxia, the improvement of microcirculation, and the reduction of edema, it has been shown. Transcranial magnetic therapy is used as an analgesic tool in onconurology. The therapeutic anti-pain effect is associated with the stimulation of the antinociceptive system, an increase in the synthesis of natural analgesics — endorphins with their subsequent release into the cerebrospinal fluid and blood. As it has already been shown, with the increase in the intensity of pain and its duration, all indicators of the quality of life and the results of treatment of the patient deteriorate, so the search for ways to improve the antitumor effectiveness of specialized treatment and eliminate the causes that prevent their im­plementation continue to be relevant and in demand.

How Do We Communicate

2020 ◽  
pp. 104-211
Keyword(s):  
Visual Communication ◽  
Electromagnetic Waves ◽  
Animal Communication ◽  
Background Information ◽  
Human Beings ◽  
Living Things ◽  
Principles Of Design ◽  
Visualization Techniques ◽  
Learning Projects

This chapter examines our modes of imparting or exchanging facts and opinions. After discussion of the role of electromagnetic waves in our sensory perception, further text describes the ways we and other living beings gain information through the senses, especially when enhanced with technology. Finally, communication between people, with computers, and with other living things is described, especially when animal communication involves senses unavailable to human beings. Emphasis is put on visual communication, some basic notions about semantics, and also visualization techniques and domains. Basic art concepts, elements of design in art, and principles of design in art serve as background information, followed by learning projects.

scholarly journals Homogenization of plasmonic crystals: seeking the epsilon-near-zero effect

2019 ◽  
Vol 475 (2230) ◽  
pp. 20190220 ◽  
Author(s):  
M. Maier ◽  
M. Mattheakis ◽  
E. Kaxiras ◽  
M. Luskin ◽  
D. Margetis
Keyword(s):  
Electromagnetic Waves ◽  
Bloch Wave ◽  
Design Problems ◽  
2D Material ◽  
Plasmonic Crystals ◽  
Optical Responses ◽  
Zero Effect ◽  
Vector Valued ◽  
Epsilon Near Zero

By using an asymptotic analysis and numerical simulations, we derive and investigate a system of homogenized Maxwell's equations for conducting material sheets that are periodically arranged and embedded in a heterogeneous and anisotropic dielectric host. This structure is motivated by the need to design plasmonic crystals that enable the propagation of electromagnetic waves with no phase delay (epsilon-near-zero effect). Our microscopic model incorporates the surface conductivity of the two-dimensional (2D) material of each sheet and a corresponding line charge density through a line conductivity along possible edges of the sheets. Our analysis generalizes averaging principles inherent in previous Bloch-wave approaches. We investigate physical implications of our findings. In particular, we emphasize the role of the vector-valued corrector field, which expresses microscopic modes of surface waves on the 2D material. We demonstrate how our homogenization procedure may set the foundation for computational investigations of: effective optical responses of reasonably general geometries, and complicated design problems in the plasmonics of 2D materials.

scholarly journals Role of nonlocality and Landau damping in the dynamics of a quantum dot coupled to surface plasmons

2016 ◽  
Vol 93 (19) ◽  
Author(s):  
A. Vagov ◽  
I. A. Larkin ◽  
M. D. Croitoru ◽  
V. M. Axt
Keyword(s):  
Quantum Dot ◽  
Surface Plasmons ◽  
Landau Damping

scholarly journals Single-plasmon interferences

2016 ◽  
Vol 2 (3) ◽  
pp. e1501574 ◽  
Author(s):  
Marie-Christine Dheur ◽  
Eloïse Devaux ◽  
Thomas W. Ebbesen ◽  
Alexandre Baron ◽  
Jean-Claude Rodier ◽  
...  
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Electromagnetic Waves ◽  
The Other ◽  
Air Interface ◽  
Wave Nature ◽  
Direct Demonstration ◽  
Wave Particle Duality ◽  
Dielectric Interfaces ◽  
Plasmon Polaritons

Surface plasmon polaritons are electromagnetic waves coupled to collective electron oscillations propagating along metal-dielectric interfaces, exhibiting a bosonic character. Recent experiments involving surface plasmons guided by wires or stripes allowed the reproduction of quantum optics effects, such as antibunching with a single surface plasmon state, coalescence with a two-plasmon state, conservation of squeezing, or entanglement through plasmonic channels. We report the first direct demonstration of the wave-particle duality for a single surface plasmon freely propagating along a planar metal-air interface. We develop a platform that enables two complementary experiments, one revealing the particle behavior of the single-plasmon state through antibunching, and the other one where the interferences prove its wave nature. This result opens up new ways to exploit quantum conversion effects between different bosonic species as shown here with photons and polaritons.

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