https://doi.org/10.1140/epjd/e2016-70547-0
Regular Article
Significant effects of cross term of Poynting vector on an electromagnetic wave propagation through a slab with low real part of impedance
1 College of Electronic Science and Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210046, P.R. China
2 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P.R. China
3 Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, Nanjing 210003, P.R. China
a
e-mail: jwchen69@sohu.com
Received: 31 August 2016
Received in final form: 19 November 2016
Published online: 9 February 2017
Energy conversion and conservation for an electromagnetic wave traveling through a slab are analyzed. It is demonstrated that a cross term of Poynting vector may occur due to interference between forward and backward waves in the slab, and may play the leading role if the slab owns low real part of impedance. Several novel electromagnetic phenomena are predicted. For example, both reflection and transmission can be enhanced significantly even if the slab is made of lossy material. This work indicates that materials with low real part of impedance, like left-handed materials and near-zero-refractive-index materials, may hold unique electromagnetic properties and merit further exploration.
Key words: Optical Phenomena and Photonics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2017
