It is found that the generalized Goos–Hänchen (GGH) shift of a light beam reflecting from a double negative metamaterial slab backed by a metal can be large positive as well as negative. We give an analytical expression for the GGH shift from which the necessary condition for the GGH shift to be positive or negative can be obtained. Numerical results validate the conclusions. A Gaussian-shaped beam was analyzed in the paraxial approximation and it was proven that there is no angular shift in this case. Finally we discuss the lossy effect of the metamaterial slab on the GGH shift.
© 2008 Optical Society of America
Original Manuscript: November 16, 2007
Revised Manuscript: March 3, 2008
Manuscript Accepted: March 3, 2008
Published: April 22, 2008
Min Cheng, Yingwu Zhou, Yuliang Li, and Xuemei Li, "Large positive and negative generalized Goos-Hänchen shifts from a double negative metamaterial slab backed by a metal," J. Opt. Soc. Am. B 25, 773-776 (2008)