School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics, Nankai University, Tianjin 300071, China.
Phys Rev Lett. 2010 Dec 17;105(25):253602. doi: 10.1103/PhysRevLett.105.253602. Epub 2010 Dec 13.
We predict a new category of optical orbital angular momentum that is associated with the curl of polarization and a kind of vector field with radial-variant hybrid states of polarization that can carry such novel optical orbital angular momentum. We present a scheme for creating the desired vector fields. Optical trapping experiments validate that the vector fields, which have no additional phase vortex, exert torques to drive the orbital motion of the trapped isotropic microspheres.
我们预测了一种新的光学轨道角动量类别，它与偏振的螺旋度以及一种具有偏振的径向变化混合态的矢量场相关联，这种矢量场可以携带这种新颖的光学轨道角动量。我们提出了一种产生所需矢量场的方案。光学捕获实验验证了这些矢量场（它们没有附加的相位涡旋）会产生力矩，从而驱动被捕获的各向同性微球的轨道运动。
