Propagation of Electric Dipole Radiation through a Medium
Joint Authors
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-14
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
When electromagnetic energy propagates through a material medium, the paths of energy flow may be altered, as compared to propagation in free space.
We consider radiation emitted by an electric dipole, embedded in a medium with permittivity εr and permeability μr.
For a linear dipole in free space, the field lines of energy flow are straight, but when the imaginary part of εr is finite, the field lines in the material become curves in the near field of the dipole.
Therefore, the energy flow is redistributed due to the damping in the material.
For a circular dipole in free space, the field lines of energy flow wind around the axis perpendicular to the plane of rotation of the dipole moment.
When εr has an imaginary part, this flow pattern is altered drastically.
Furthermore, when the real part of εr is negative, the direction of rotation of the flow lines reverses.
In that case, the energy in the field rotates opposite to the direction of rotation of the dipole moment.
It is indicated that in metamaterials with a negative index of refraction this may lead to an observable effect in the far field.
American Psychological Association (APA)
Li, Xin& Arnoldus, Henk F.. 2012. Propagation of Electric Dipole Radiation through a Medium. ISRN Optics،Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-503751
Modern Language Association (MLA)
Li, Xin& Arnoldus, Henk F.. Propagation of Electric Dipole Radiation through a Medium. ISRN Optics No. 2012 (2012), pp.1-7.
https://search.emarefa.net/detail/BIM-503751
American Medical Association (AMA)
Li, Xin& Arnoldus, Henk F.. Propagation of Electric Dipole Radiation through a Medium. ISRN Optics. 2012. Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-503751
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-503751