A concrete design for an orthogonal polarization rotator at optical frequencies is presented. The subwavelength rotator is formed from a pair of ultrathin metamaterial plates of transparency and remarkable anisotropy. By traveling through the rotator, the incident light of linear polarization undergoes the azimuth-angle rotation by about 90° for a wide range of incident azimuth angles from 0° to 90°. The orthogonal rotator proposed here works with the 1/4 thickness of the incident wavelength and keeps the transmittance as high as 50%, showing a high efficiency as a subwavelength optical element.
© 2010 Optical Society of America
Original Manuscript: October 14, 2009
Revised Manuscript: November 20, 2009
Manuscript Accepted: November 20, 2009
Published: January 11, 2010
Masanobu Iwanaga, "Subwavelength orthogonal polarization rotator," Opt. Lett. 35, 109-111 (2010)