Experimental realization of a high-contrast grating based broadband quarter-wave plate
Akosman, A. E.
Optical Society of America
Mutlu, M., Akosman, A. E., Kurt, G., Gokkavas, M., & Ozbay, E. (2012). Experimental realization of a high-contrast grating based broadband quarter-wave plate. Optics express, 20(25), 27966-27973.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/13020
Fabrication and experimental characterization of a broadband quarter-wave plate, which is based on two-dimensional and binary silicon high-contrast gratings, are reported. The quarter-wave plate feature is achieved by the utilization of a regime, in which the proposed grating structure exhibits nearly total and approximately equal transmission of transverse electric and transverse magnetic waves with a phase difference of approximately pi/2. The numerical and experimental results suggest a percent bandwidth of 42% and 33%, respectively, if the operation regime is defined as the range for which the conversion efficiency is higher than 0.9. A compact circular polarizer can be implemented by combining the grating with a linear polarizer. (C) 2012 Optical Society of America