Polarization singularities and orbital angular momentum sidebands from rotational symmetry broken by the Pockels effect.
Polarization singularities and orbital angular momentum sidebands from rotational symmetry broken by the Pockels effect.
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普克尔斯效应破坏的旋转对称性产生的偏振奇点和轨道角动量边带
DOI:
10.1038/srep04865
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发表时间:
2014-05-02
影响因子:
4.6
通讯作者:
Chen L
中科院分区:
文献类型:
--
作者:
Lu X;Wu Z;Zhang W;Chen L
The law of angular momentum conservation is naturally linked to the rotational symmetry of the involved system. Here we demonstrate theoretically how to break the rotational symmetry of a uniaxial crystal via the electro-optic Pockels effect. By numerical method based on asymptotic expansion, we discover the 3D structure of polarization singularities in terms ofClines andLsurfaces embedded in the emerging light. We visualize the controllable dynamics evolution of polarization singularities when undergoing the Pockels effect, which behaves just like the binary fission of a prokaryotic cell, i.e., the splitting ofCpoints and fission ofLlines are animated in analogy with the cleavage of nucleus and division of cytoplasm. We reveal the connection of polarization singularity dynamics with the accompanying generation of orbital angular momentum sidebands. It is unexpected that although the total angular momentum of light is not conserved, the total topological index ofCpoints is conserved.
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