Department Radiation, Radionuclides & Reactors, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands.
Phys Rev Lett. 2010 Jan 8;104(1):010401. doi: 10.1103/PhysRevLett.104.010401.
The Goos-Hänchen effect is a spatial shift along an interface resulting from an interference effect that occurs for total internal reflection. This phenomenon was suggested by Sir Isaac Newton, but it was not until 1947 that the effect was experimentally observed by Goos and Hänchen. We provide the first direct, absolute, experimental determination of the Goos-Hänchen shift for a particle experiencing a potential well as required by quantum mechanics: namely, wave-particle duality. Here, the particle is a spin-polarized neutron reflecting from a film of magnetized material. We detect the effect through a subtle change in polarization of the neutron. Here, we demonstrate, through experiment and theory, that neutrons do exhibit the Goos-Hänchen effect and postulate that the associated time shift should also be observable.
古斯-汉欣效应是一种沿界面发生的空间位移，是全内反射时干涉效应产生的结果。这一现象由艾萨克·牛顿爵士提出，但直到 1947 年，古斯和汉欣才通过实验观察到这一效应。我们首次直接、绝对地实验确定了量子力学所要求的处于位势阱中粒子的古斯-汉欣位移：即波粒二象性。在这里，粒子是从磁化材料薄膜反射的极化中子。我们通过探测中子极化的细微变化来探测到这一效应。在这里，我们通过实验和理论证明了中子确实表现出了古斯-汉欣效应，并假设相关的时间位移也应该是可观测的。
