Optics and Materials Group–Optma, Universidade Federal de Alagoas, Caixa Postal 2051, Maceió, Alagoas, 57061-970, Brazil.
Opt Lett. 2011 Aug 15;36(16):3106-8. doi: 10.1364/OL.36.003106.
We study the Fraunhofer diffraction problem while taking into account the orbital angular momentum of light. In this case, the phase singularity of the light beam is incident on the slit in two different cases: in one, it is incident slightly above the slit, and in the other it is centered on the slit. We observed that the symmetry and the fringe formation in the interference pattern strongly depend on the amount of orbital angular momentum and the slit position in relation to the beam.
我们研究了考虑光的轨道角动量的夫琅禾费衍射问题。在这种情况下，光束的相位奇点以两种不同的情况入射到狭缝上：一种情况是稍微高于狭缝入射，另一种情况是位于狭缝中心。我们观察到，干涉图样的对称性和条纹形成强烈地依赖于轨道角动量的大小以及狭缝相对于光束的位置。
