RT Conference Proceedings
T1 Designing polarization management devices by tilting subwavelength grating structures
A1 Luque-González, José Manuel
A1 Herrero-Bermello, Alaine
A1 Ortega-Moñux, Alejandro
A1 Molina-Fernández, Íñigo
A1 Velasco, Aitor V.
A1 Cheben, Pavel
A1 Schmid, Jens H.
A1 Wang, Shurui
A1 Halir, Robert
K1 Optica integrada
K1 Materiales ópticos
K1 Metamateriales
AB Subwavelength gratings (SWG) are periodic structures which behave as controllable homogeneous metamaterials.SWGs are extremely interesting when they are used in platforms with a limited choice of material refractiveindices, enabling the design of a myriad of high-performance devices. Here we present a novel technique togain control over the intrinsic anisotropy of the synthesized metamaterial. We show that tilting the siliconsegments in a SWG structure mainly affects the in-plane (TE) modes, with little impact on the out-of-plane(TM) modes. Moreover, we present a methodology to quickly but accurately calculate the modes of a tiltedperiodic structure modeling the structure as a rotated uniaxial crystal which can be solved with an anisotropicmode solver. Measurements on a set of fabricated tilted SWG waveguides validate our simulation results. Byusing the presented technique, we design a polarization beam splitter based on a 2x2 multimode interferometer.The design is based on the optimization of the tilting angle to tone the beat length of the TE modes to be a halfof the beat length of the TM modes.
YR 2019
FD 2019-05-03
LK https://hdl.handle.net/10630/17610
UL https://hdl.handle.net/10630/17610
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech; Ministerio de Economía y Competitividad (MINECO) (IJCI-2016-30484, TEC2015-71127-C2-R, TEC2016-80718-R); Ministerio de Educación, Cultura y Deporte (MECD) (FPU16/06762); European Regional Development Fund (ERDF); Comunidadde Madrid (SINFOTON-CM S2013/MIT-2790); European Association of National Metrology Institutes (EURAMET) (H2020-MSCA-RISE-2015:SENSIBLE, JRP-i22 14IND13 Photind).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026