Merano M, Aiello A, 't Hooft G W, van Exter M P, Eliel E R, Woerdman J P
Opt Express. 2007 Nov 26;15(24):15928-34. doi: 10.1364/oe.15.015928.
We report the first observation of the Goos-Hänchen shift of a light beam incident on a bare metal surface. This phenomenon is particularly interesting because the Goos-Hänchen shift for p polarized light in metals is negative and much bigger than the positive shift for s polarized light. The experimental result for the measured shifts as a function of the angle of incidence is in excellent agreement with theoretical predictions. In an energy-flux interpretation, our measurement shows the existence of a backward energy flow at the bare metal surface when this is excited by a p polarized beam of light.
我们报告了首次观察到光束入射到裸金属表面时的古斯-汉欣位移。这种现象特别有趣，因为金属中p偏振光的古斯-汉欣位移为负，且比s偏振光的正位移大得多。测量的位移随入射角变化的实验结果与理论预测非常吻合。在能流解释中，我们的测量表明，当裸金属表面被p偏振光束激发时，存在向后的能流。
