Acta Optica Sinica, Volume. 30, Issue 11, 3311(2010)
Angular Shift of Gaussian Beams at Metamaterial Interfaces
On the basis of angular spectrum representation, a formalism is established to study the angular shift of a Gaussian beam at the interface associated with negative, near-zero, and ultrahigh-index metamaterials. The difference and relation between beam′s angular shift and traditional Goos-Hnchen shift, Imbert-Fedorov shift are revealed. It is found that the divergence angular shift increases with decrease of the refractive index and loss. Additioanlly, in the interface of negative index media, the angular shift can counteract the negative Goos-Hanchen shift which leads to positive longitudinal divergence angular shift. When the refraction index is close to zero, the transverse divergence angular shift disappears in a large range of incident angle range. The transverse divergence angular shift is unobvious as refraction index is very large. So, metamaterials with close to zero and very large refraction index can be used to avoid the angular dispersion caused by angular shift.
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Huang Wenjing, Luo Hailu, Wen Shuangchun. Angular Shift of Gaussian Beams at Metamaterial Interfaces[J]. Acta Optica Sinica, 2010, 30(11): 3311
Category: Physical Optics
Received: Oct. 10, 2009
Accepted: --
Published Online: Nov. 16, 2010
The Author Email: Wenjing Huang (lizzyhwj@yahoo.com.cn)