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Electromagnetic energy in absorptive and dispersive medium based on the assembly of atomic oscillators
Author(s) -
Cao Haibo,
Cui Tie Jun
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21899
Subject(s) - microwave , permittivity , electromagnetics , physics , electromagnetic radiation , metamaterial , electromagnetic theory , computational physics , quantum electrodynamics , electrical engineering , engineering , optics , optoelectronics , quantum mechanics , engineering physics , dielectric
On the basis of the idealized structure of an atomic medium described by an assembly of independent oscillators, expressions for the stored electric and magnetic energy densities in absorptive and dispersive medium are derived. Such formulas are also valid for a left‐handed medium (LHM), where the permittivity and permeability are simultaneously less than zero within a frequency band. These formulas are completely equivalent to those derived from a general definition of electromagnetic energy density using the classical electromagnetics. It has been shown that the stored energy densities, no matter in a right‐handed medium or in a left‐handed medium, are always positive. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2288–2291, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21899