CREOL/College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA.
Opt Lett. 2011 Aug 15;36(16):3103-5. doi: 10.1364/OL.36.003103.
Nonconservative optical forces acting on dipolar particles are considered in longitudinally invariant optical fields. We demonstrate that the orientation of these forces is strictly dictated by the propagation vector associated with such field configurations. As a direct consequence of this, it is impossible to achieve a reversal of optical forces in homogeneous media. We show instead that translation invariant optical tractor fields can in fact be generated in the negative index environment produced in a special class of fully dielectric waveguide arrays.
在纵向不变的光场中考虑作用在偶极子上的非保守光学力。我们证明，这些力的方向严格由与这种场构型相关联的传播矢量决定。因此，在均匀介质中不可能实现光学力的反转。相反，我们表明，实际上可以在由一类特殊的全介电波导阵列产生的负折射率环境中产生平移不变的光学牵引场。
