Stored energy density of electromagnetic wave in dispersive media

Dai, Yuyao; Xuanyuan, Yu; Chen, Jiangwei

doi:10.1016/j.ijleo.2019.163999

Cited by 3 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, in a medium with refractive index less than one, a lot of efforts are required to explain how the propagation speed of electromagnetic wave does not exceed the speed of light in vacuum. In addition, it is noted that proper expressions of time-averaged stored and dissipated energy densities have been re-investigated recently [19,[35][36][37][38][39], which may influence proper description of energy velocity. Therefore, to determine whether velocity of energy and/or signal may exceed the speed of light in vacuum, it is necessary to carry out further researches from both theories and experiments.…”

Section: On Superluminal Phenomenamentioning

confidence: 99%

Optical Doppler effect in a ZIM: a new possible way examining applicability of Lorentz transformations in materials

Chen

2024

Preprint

Self Cite

View full text Add to dashboard Cite

There exist unresolved problems such as Abraham-Minkowski controversy (A-MC) and possibility of superluminal phenomena, which relate to applicability of Lorentz transformations (LTs) in materials. In this work, we shall show that, usually, expression(s) of optical Doppler shift (ODFS) may be obtained on the basis of LTs, which predicts that, in a zero-index metamaterial (ZIM), ODFS holds a nonzero second-order small quantity. Noting the report that, in a ZIM, there is no ODFS observed for a beam of microwave reflected by a moving surface, which indicates preliminarily that applicability of LTs in materials need to be further investigated. On the other hand, drawing lessons from general relativity and combining Fermat’s principle, it is proposed that LTs may be modified as that speed of light in free space should be replaced by phase velocity of light in a medium. Thus another expression of ODFS is obtained, which predicts that, in a ZIM, ODFS equals to zero strictly. This work may provide a new possible way to examine applicability of LTs in materials, and deepen the understanding of foundations of relativity. PACS: 03.30. +p, 03.50.De

show abstract