Abstract

We investigate quasi-steady-state (QSS) self-focusing in nonlinear left-handed metamaterials (NL-LHMs) theoretically. We have found that the negative refraction property of LHMs leads to the fact that the changes of the self-focusing distance and the focus appearing time with the spatial-focusing property of the input pulse are contrary to their counterparts for a conventional self-focusing medium. It is further shown that, as the convergence of the input pulse decreases, the first focus appears earlier and corresponds to smaller self-focusing distances, and that the focus moves more slowly at the smallest self-focusing distance, indicating a relatively higher risk of optical damage formation, in sharp contrast with a conventional self-focusing case. Besides, the divergent incidence cases have finite focus moving ranges.

© 2009 Optical Society of America

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History
Original Manuscript: August 3, 2009
Manuscript Accepted: August 30, 2009
Revised Manuscript: August 27, 2009
Published: October 5, 2009

References

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Author Affiliations

Hui Zhuo

Information Science and Technology College, Hunan Agricultural University, Changsha 410128, China

Yonghua Hu

School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

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