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Negative group velocity and group delay in left-handed media

2004; American Physical Society; Volume: 70; Issue: 4 Linguagem: Inglês

10.1103/physreve.70.046603

1550-2376

J. F. Woodley, Mo Mojahedi,

Terahertz technology and applications

The dynamics of wave propagation in media with negative index of refraction is analyzed through analytical calculations, simulations, and experiments. Using a free space setup, the transmission characteristics of two split ring resonator and strip wire left-handed media (LHM), designed for operation at K -band frequencies (18-26 GHz), are measured. The first LHM, which is 3 unit cells long in the propagation direction, exhibits a maximum negative group delay of -0.9 ns . The second LHM (4 unit cells long) exhibits a maximum negative group delay of -1.2 ns . For both LHM the bandwidth of the negative group delay (and hence the negative group velocity) region was approximately 250 MHz.