Mutlu, M.Akosman, A. E.Kurt, G.Gokkavas, M.Özbay, Ekmel2015-07-282015-07-282012-12-031094-4087http://hdl.handle.net/11693/13020Fabrication 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 AmericaEnglishPolarizerReflectorsFabricationLaserArticle10.1364/OE.20.027966