title: Experimental realization of a high-contrast grating based broadband quarter-wave plate.
abstract: 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 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.
authors.affiliation: Department of Electrical and Electronics Engineering, Bilkent University, 06800 Ankara, Turkey. mutlu@ee.bilkent.edu.tr
authors.forename: Mehmet
authors.initials: M
authors.lastname: Mutlu
authors.forename: Ahmet E
authors.initials: AE
authors.lastname: Akosman
authors.forename: Gokhan
authors.initials: G
authors.lastname: Kurt
authors.forename: Mutlu
authors.initials: M
authors.lastname: Gokkavas
authors.forename: Ekmel
authors.initials: E
authors.lastname: Ozbay
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D017076:Computer-Aided Design; D060733:Electromagnetic Radiation; D005336:Fiber Optic Technology / Q000379:methods*; D050866:Liquid Crystals; D008962:Models, Theoretical; D036103:Nanotechnology / Q000379:methods*; D012825:Silicon / Q000737:chemistry
chemical_list: D000537:Aluminum Oxide; D012825:Silicon