RT Journal Article
T1 Bricked subwavelengh gratings: A tailorable biaxial on-chip metamaterial topology
A1 Luque-González, José Manuel
A1 Ortega-Moñux, Alejandro
A1 Halir, Robert
A1 Schmid, Jens H.
A1 Cheben, Pavel
A1 Molina-Fernández, Íñigo
A1 Wanguemert-Pérez, Juan Gonzalo
K1 Silicio - Propiedades ópticas
AB Integrated metamaterials are redefining the capabilities of silicon photonic chips. In providing lithographic control over dielectric permittivity, dispersion and anisotropy, they are enabling photonic devices with unprecedented performance. However, the implementation of these materials at telecom wavelengths often requires a fabrication resolution of the order of 100 nm and below, pushing current wafer-scale fabrication technology to its limits and hindering the widespread exploitation of on-chip metamaterials. Herein, a subwavelength grating metamaterial with bricked topology is proposed, that provides lithographic control over the metamaterial dispersion and anisotropy using a single etch Manhattan-like geometry with pixel dimensions up to 150 × 150 nm2, thereby easing the path toward fabrication at wafer-scale. The behavior of these structures as biaxial crystals is analytically shown, validating their use in high performance on-chip beam-splitters. Through engineering of the metamaterial anisotropy tensor, the splitters are shown to exhibit sub-decibel insertion losses and imbalance over a 400 nm design bandwidth, via 3D FDTD simulations. The excellent device performance is demonstrated over a 140 nm bandwidth, limited by the measurement setup.
PB Wiley
YR 2021
FD 2021
LK https://hdl.handle.net/10630/34176
UL https://hdl.handle.net/10630/34176
LA eng
NO J. M. Luque-González, A. Ortega-Moñux, R. Halir, J. H. Schmid, P. Cheben, Í. Molina-Fernández, J. G. Wangüemert-Pérez, Bricked Subwavelength Gratings: A Tailorable On-Chip Metamaterial Topology. Laser & Photonics Reviews 2021, 15, 2000478. https://doi.org/10.1002/lpor.202000478
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026