Polarization singularities in optical lattices |
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Authors: | Freund Isaac |
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Institution: | Deportment of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel. freund@mail.biu.ac.il |
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Abstract: | Polarization singularities are shown to be unavoidable features of three-dimensional optical lattices. These singularities take the form of lines of circular polarization, C lines, and lines of linear polarization, L lines. The polarization figures surrounding a C line (L line) rotate about the line with winding number +/-1/2 (+/-1). C and L lines permeate the lattice, meander throughout the unit cell, and form closed loops. Surprisingly, every point in a linearly polarized optical lattice is found to be a singularity about which the surrounding polarization vectors rotate with an integer winding number. |
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