The negative index of refraction demystified
By Martin McCall, Akhlesh Lakhtakia, W. Weiglhofer. 2002
221 citations recorded by the source corpus.
We study electromagnetic wave propagation in media in which the effective relative permittivity and the effective relative permeability are allowed to take any value in the upper half of the complex plane. A general condition is derived for the phase velocity to be oppositely directed to the power flow. That extends the recently studied case of propagation in media for which the relative permittivity and relative permeability are both simultaneously negative, to include dissipation as well. An illustrative case study demonstrates that in general the spectrum divides into five distinct regions.
Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Mathematical Physics
View Paper: https://www.semanticscholar.org/paper/41a307663cc3a297c662b45943dc1c03a59ea54f
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In Atomic and Molecular Physics, and Optics
- Nader Engheta
- Richard W. Ziolkowski
- Andrea Alù
- Vladimir M. Shalaev
- Boqin Zhao
- Zhuomin M. Zhang
- Fernando Lisboa Teixeira
In Electronic, Optical and Magnetic Materials
- Nader Engheta
- Richard W. Ziolkowski
- Akhlesh Lakhtakia
- Andrea Alù
- A. Erentok
- Vladimir M. Shalaev
- Fu‐Chiarng Chen
- Jiunn‐Nan Hwang
Citations in the corpus
- A new condition to identify isotropic dielectric‐magnetic materials displaying negative phase velocity (2003, background): “constitutive parameters of an isotropic dielectric–magnetic medium to have phase velocity directed oppositely to the power flow, was reported about two years ago [4]: Most importantly, according to that condition, the real parts of both the permittivity and the permeability need not be both negative”
- A positive future for double-negative metamaterials (2005, background): “…(also known as LH medium [1], negative-index materials (NIMs) [14], [15], backward-wave media (BW) [16], and negative-phase-velocity (NPV) media [17], [18] to name a few); electromagnetic bandgap (EBG) structured materials, and complex surfaces such as high-impedance ground planes and…”