Dispersivity of Balanced Near-Zero Permittivity and Permeability (EMNZ) Medium

Raphael Kastner*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


ϵ-near-zero (ENZ), μ-near-zero (MNZ), and ϵ-and-μ-near-zero (EMNZ) materials all exhibit the property of n=√ ϵ r μ r ≈ 0. The wave impedance Z=(μ/ϵ)1/2, though, is different for the different materials. For the EMNZ, the impedance can remain finite, in contrast to the ENZ and MNZ materials. Therefore, the electric and magnetic fields within the EMNZ can remain coupled, unlike the ENZ and MNZ. This paper presents an analysis of dispersivity in an EMNZ layer under the condition of balance μ r=ϵ r. One possible application for this condition is seen in the analysis of transmission and reflection from an EMNZ-free space interface, which reveals that a perfect match condition is possible for normal incidence, while for any other incidence angle, this interface is a perfect reflector.

Original languageEnglish
Article number7549113
Pages (from-to)3108-3112
Number of pages5
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number10
StatePublished - Oct 2016


  • perfectly matched surface
  • μ-near-zero (MNZ)
  • ϵ-near-zero (EMZ)


Dive into the research topics of 'Dispersivity of Balanced Near-Zero Permittivity and Permeability (EMNZ) Medium'. Together they form a unique fingerprint.

Cite this