Experimental observation of light refraction going from negative to positive in the visible region at the pure air/Au interface
Experimental observation of light refraction going from negative to positive in the visible region at the pure air/Au interface
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DOI：
10.1103/physrevb.77.035134
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发表时间：
2008-01
影响因子：
3.7
通讯作者：
Yun-Hua Wu;W. Gu;Yue-Rui Chen;Xiao-Fan Li;Xiaosong Zhu;P. Zhou;Jing Li;Yuxiang Zheng;Liang-Yao Chen
中科院分区：
文献类型：
--
作者：
Yun-Hua Wu;W. Gu;Yue-Rui Chen;Xiao-Fan Li;Xiaosong Zhu;P. Zhou;Jing Li;Yuxiang Zheng;Liang-Yao Chen
We report wavelength-dependent refraction going from negative to positive in the visible region for the pure air/Au interface by fabricating a series of prismlike Au film samples. Results qualitatively agree with dispersion of the group refractive index ng, in which the spectral properties of the phase refractive index np, play a significant role to make both the magnitude and sign of ng change in the energy region where interband transitions occur. The net refraction observed for the simplest air and metal interface will stimulate further exploration of the physical origin of slow or fast light characterized by the law of refraction in nature.
