Eur. Phys. J. Appl. Phys.
Volume 53, Number 1, January 2011
|Number of page(s)||7|
|Published online||23 December 2010|
The role of absorption and dispersion in resonant tunnelling through a negative index medium
Indian Institute of Technology Kharagpur, 721302 Kharagpur, India
2 School of Physics, University of Hyderabad, 500046 Hyderabad, India
Corresponding author: firstname.lastname@example.org
Accepted: 6 October 2010
Published online: 23 December 2010
We study resonant tunneling through a layered medium with a passive negative index medium (NIM) slab as a constituent layer. Using a causal model for susceptibilities with the parameters of a recently reported metamaterial [G. Dolling, C. Enkrich, M. Wegener, C.M. Soukoulis, S. Linden, Opt. Lett. 31, 1800 (2006)] we show that resonant tunnelling and the associated delay are mostly suppressed. This is in sharp contrast with the naive approach of retaining phase velocity dispersion with arbitrary low losses, predicting sharp resonances with large associated delays. This is shown to be a nontrivial issue because of the necessity of losses for NIM behaviour, while their presence spoils the quality factor of the resonant devices.
© EDP Sciences, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.