We present a mid-IR highly tunable optical polarization converter composed of asymmetric graphene nanocrosses. It can convert linearly polarized light to circularly and elliptically polarized light or exhibit a giant optical activity at different wavelengths. The transmitted wavelength and polarization states can also be dynamically tuned by varying the Fermi energy of graphene, without reoptimizing and refabricating the nanostructures. This offers a further step in developing a controllable polarization converter.
© 2013 Optical Society of America
Optics at Surfaces
Original Manuscript: February 6, 2013
Revised Manuscript: March 20, 2013
Manuscript Accepted: April 3, 2013
Published: April 30, 2013
Hua Cheng, Shuqi Chen, Ping Yu, Jianxiong Li, Li Deng, and Jianguo Tian, "Mid-infrared tunable optical polarization converter composed of asymmetric graphene nanocrosses," Opt. Lett. 38, 1567-1569 (2013)