Negative refraction at the pure Ag/air interface observed in the visible Drude region

Yun-Hua Wu; Wen Gu; Yue-Rui Chen; Zhong-Hong Dai; Wei-Xi Zhou; Yu-Xiang Zheng; Liang-Yao Chen
August 2008
Applied Physics Letters;8/18/2008, Vol. 93 Issue 7, p071910
Academic Journal
Pure negative refraction was found for a series of prismlike Ag film samples measured in the visible Drude region. Results show that the pseudonegative refraction index nm changes with the photon energy and has a spectral trend to be less negative with the increasing energy. Light refraction will be expected to be positive in the higher energy region where the interband transitions dominate the interaction between the electrons and photons in Ag.


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