Negative group velocity and group delay in left-handed media

Autor:	J. F. Woodley, Mo Mojahedi
Rok vydání:	2004
Předmět:	Split-ring resonator Left handed Physics Optics business.industry Wave propagation Group velocity Atomic physics business Refractive index Quantum tunnelling Imaging phantom Group delay and phase delay
Zdroj:	Physical Review E. 70
ISSN:	1550-2376 1539-3755
DOI:	10.1103/physreve.70.046603
Popis:	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 $\ensuremath{-}0.9\phantom{\rule{0.3em}{0ex}}\mathrm{ns}$. The second LHM (4 unit cells long) exhibits a maximum negative group delay of $\ensuremath{-}1.2\phantom{\rule{0.3em}{0ex}}\mathrm{ns}$. For both LHM the bandwidth of the negative group delay (and hence the negative group velocity) region was approximately 250 MHz.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aacc5b8d0f01f65c4de2194764cc2327 https://doi.org/10.1103/physreve.70.046603 Zobrazit plný text záznamu