Experimental realization of a high-contrast grating based broadband quarter-wave plate

Mehmet Mutlu, Ahmet E. Akosman, Gokhan Kurt, Mutlu Gokkavas, Ekmel Ozbay
2012 Optics Express  
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 π/2. The numerical and experimental results suggest a
more » ... t 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.
doi:10.1364/oe.20.027966 pmid:23262743 fatcat:wj46gmyxpjcrndl74am5mxafsm