RT Journal Article
T1 Tilted subwavelength gratings: controlling anisotropy in metamaterial nanophotonic waveguides
A1 Luque-González, José Manuel
A1 Herrero-Bermello, Alaine
A1 Ortega-Moñux, Alejandro
A1 Molina-Fernández, Íñigo
A1 Halir, Robert
A1 Wang, Shurui
A1 Schmid, Jens H.
A1 Cheben, Pavel
A1 Velasco, Aitor V.
K1 Optica integrada
AB Subwavelength grating (SWG) structures are an essential toolin silicon photonics, enabling the synthesis of metamaterialswith a controllable refractive index. Here we propose, for thefirst time to the best of our knowledge, tilting the grating elementsto gain control over the anisotropy of the metamaterial.Rigorous finite difference time domain simulationsdemonstrate that a 45° tilt results in an effective index variationon the fundamental TE mode of 0.23 refractive indexunits, whereas the change in the TM mode is 20 times smaller.Our simulation predictions are corroborated by experimentalresults. We furthermore propose an accurate theoreticalmodel for designing tilted SWG structures based on rotateduniaxial crystals that is functional over a wide wavelengthrange and for both the fundamental and higher order modes.The proposed control over anisotropy opens promising venuesin polarization management devices and transformationoptics in silicon photonics.
YR 2018
FD 2018-10-24
LK https://hdl.handle.net/10630/16695
UL https://hdl.handle.net/10630/16695
LA eng
NO Universidad de Málaga (UMA); Ministerio deEconomía y Competitividad (MINECO) (IJCI-2016-30484,TEC2015-71127-C2-R, TEC2016-80718-R); Ministerio deEducación, Cultura y Deporte (MECD) (FPU16/06762);European Regional Development Fund (ERDF); Comunidadde Madrid (SINFOTON-CM S2013/MIT-2790); EuropeanAssociation of National Metrology Institutes (EURAMET)(H2020-MSCA-RISE-2015:SENSIBLE, JRP-i22 14IND13Photind).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026