Observation of the spin Hall effect of light via weak measurements
Observation of the spin Hall effect of light via weak measurements
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DOI：
10.1126/science.1152697
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发表时间：
2008-02-08
期刊：
影响因子：
56.9
通讯作者：
Kwiat, Paul
中科院分区：
文献类型：
--
作者：
Hosten, Onur;Kwiat, Paul
我们已经检测到垂直于折射率梯度的自旋相关位移，光子通过空气-玻璃界面。该效应是电子系统中自旋霍尔效应的光子版本，表明该效应对不同性质的粒子具有普遍性。将该效应视为光子自旋投影的微弱测量，我们使用自旋态的预选择和后选择技术将原始位移提高了近4个数量级，获得了类似于1埃的位移灵敏度。自旋霍尔效应可用于控制光子角动量态，该测量技术有望用于精密计量。
We have detected a spin-dependent displacement perpendicular to the refractive index gradient for photons passing through an air-glass interface. The effect is the photonic version of the spin Hall effect in electronic systems, indicating the universality of the effect for particles of different nature. Treating the effect as a weak measurement of the spin projection of the photons, we used a preselection and postselection technique on the spin state to enhance the original displacement by nearly four orders of magnitude, attaining sensitivity to displacements of similar to 1 angstrom. The spin Hall effect can be used for manipulating photonic angular momentum states, and the measurement technique holds promise for precision metrology.