Negative Refractive Index in Left-Handed Materials
Journal Article
·
· Physical Review Letters
The real part of the refractive index n({omega}) of a nearly transparent and passive medium is usually taken to have only positive values. Through an analysis of a current source radiating into a 1D ''left-handed'' material (LHM) -- where the permittivity and permeability are simultaneously less than zero -- we determine the analytic structure of n({omega}) , demonstrating frequency regions where the sign of Re[n({omega})] must, in fact, be negative. The regime of negative index, made relevant by a recent demonstration of an effective LHM, leads to unusual electromagnetic wave propagation and merits further exploration.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205858
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 85; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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