A figure from the paper by Allen et al., showing the torque that light could impart on cylindrical lenses.
A figure from the paper by Allen et al., showing the torque that light could impart on cylindrical lenses. The 1992 paper on the orbital angular momentum of light by Les Allen, Marco Beijersbergen, Robert Spreeuw (UvA-IoP) and Han Woerdman has been chosen as one of three "classic" papers by the journal Physical Review A. The first issue of Physical Review A appeared in 1970, 50 years ago this year. On the occasion of this golden anniversary, the journal asked its editors to pick the three most interesting and influential papers. The paper by Spreeuw and his collaborators was chosen as one of the three "classic" papers. Donut modes. In the 1992 paper, the authors address the question whether light can have so-called "orbital angular momentum".
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