Using numerical modeling, it is shown that chains of dielectric spheres and cylinders act as polarizers. The mechanism is based on gradual filtering of periodically focused modes with a certain polarization propagating with minimal losses due to Brewster angles conditions, whereas orthogonally polarized modes are strongly attenuated. It is shown that chains of cylinders filter linearly polarized beams, whereas chains of spheres filter radially polarized beams. In the geometrical optics limit, we show that in a range of sphere refractive indices 1.68–1.80 a degree of radial polarization in excess of 0.9 can be obtained in 10-sphere-long chains.
© 2013 Optical Society of America
Original Manuscript: August 5, 2013
Revised Manuscript: September 14, 2013
Manuscript Accepted: September 17, 2013
Published: October 14, 2013
Arash Darafsheh, Neda Mojaverian, Nicholaos I. Limberopoulos, Kenneth W. Allen, Anatole Lupu, and Vasily N. Astratov, "Formation of polarized beams in chains of dielectric spheres and cylinders," Opt. Lett. 38, 4208-4211 (2013)