Novel devices for converting a linear polarization state to radial or azimuthal polarization states are realized by use of space-variant inhomogeneous media on a subwavelength scale. The two designs presented use form birefringence to locally transform the polarization state. The devices are fabricated in a GaAs substrate for operation in the far-infrared wavelength range. The experimental characterization is in good agreement with the designs, demonstrating high conversion efficiency.
© 2004 Optical Society of America
Uriel Levy, Chia-Ho Tsai, Lin Pang, and Yeshaiahu Fainman, "Engineering space-variant inhomogeneous media for polarization control," Opt. Lett. 29, 1718-1720 (2004)