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dc.contributor.authorMutlu, M.en_US
dc.contributor.authorAkosman, A.E.en_US
dc.contributor.authorKurt G.en_US
dc.contributor.authorGokkavas, M.en_US
dc.contributor.authorOzbay, E.en_US
dc.date.accessioned2016-02-08T09:38:16Z
dc.date.available2016-02-08T09:38:16Z
dc.date.issued2013en_US
dc.identifier.issn0277786X
dc.identifier.urihttp://hdl.handle.net/11693/20936
dc.description.abstractIn this paper, we report the theoretical and experimental possibility of achieving a quarter-wave plate regime by using high-contrast gratings, which are binary, vertical, periodic, near-wavelength, and two-dimensional high refractive index gratings. Here, we investigate the characteristics of two distinct designs, the first one being composed of silicon-dioxide and silicon, and the second one being composed of silicon and sapphire. The suggested quarter-wave plate regime is achieved by the simultaneous optimization of the transverse electric and transverse magnetic transmission coefficients, TTE and TTM, respectively, and the phase difference between these transmission coefficients, such that |TTM| ≅ |TTE| and \TTM - \TTE ≅ -/2. As a result, a unity circular polarization conversion efficiency is achieved atλ0 = 1.55 μm for both designs. For the first design, we show the obtaining of unity conversion efficiency by using a theoretical approach, which is inspired by the periodic waveguide interpretation, and rigorous coupled-wave analysis (RCWA). For the second design, we demonstrate the unity conversion efficiency by using the results of finite-difference time-domain (FDTD) simulations. Furthermore, the FDTD simulations, where material dispersion is taken into account, suggest that an operation percent bandwidth of 51% can be achieved for the first design, where the experimental results for the second design yield a bandwidth of 33%. In this context, we define the operation regime as the wavelength band for which the circular conversion efficiency is larger than 0.9. © 2013 SPIE.en_US
dc.language.isoEnglishen_US
dc.source.titleProceedings of SPIE - The International Society for Optical Engineeringen_US
dc.relation.isversionofhttp://dx.doi.org/10.1117/12.2009347en_US
dc.subjectHigh-contrast gratingen_US
dc.subjectPeriodic slab waveguideen_US
dc.subjectPolarizationen_US
dc.subjectQuarter-wave plateen_US
dc.subjectFinite-difference time-domain simulationen_US
dc.subjectHigh-contrast gratingsen_US
dc.subjectQuarter wave-plateen_US
dc.subjectRigorous coupled wave analysisen_US
dc.subjectSimultaneous optimizationen_US
dc.subjectSlab waveguidesen_US
dc.subjectTheoretical and experimentalen_US
dc.subjectTransmission coefficientsen_US
dc.subjectBandwidthen_US
dc.subjectConversion efficiencyen_US
dc.subjectDesignen_US
dc.subjectDiffraction gratingsen_US
dc.subjectFinite difference time domain methoden_US
dc.subjectPolarizationen_US
dc.subjectRefractive indexen_US
dc.subjectSapphireen_US
dc.subjectSiliconen_US
dc.subjectTruck trailersen_US
dc.subjectLight polarizationen_US
dc.titleBroadband quarter-wave plates at near-infrared using high-contrast gratingsen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineering
dc.departmentNANOTAM - Nanotechnology Research Center
dc.departmentDepartment of Physics
dc.citation.volumeNumber8633en_US
dc.identifier.doi10.1117/12.2009347en_US


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