RT Journal Article
T1 An ultracompact GRIN lens based spot size converter using subwavelength grating metamaterials
A1 Luque-González, José Manuel
A1 Halir, Robert
A1 Wanguemert-Pérez, Juan Gonzalo
A1 De-Oliva-Rubio, José
A1 Schmid, Jens H.
A1 Cheben, Pavel
A1 Molina-Fernández, Íñigo
A1 Ortega-Moñux, Alejandro
K1 Metamateriales
K1 Luz - Propagación
K1 Fotones
AB Graded-index materials offer virtually complete control over light propagation in integrated photonic chips but can be challenging to implement. Here, an anisotropic graded-index metamaterial, synthesized with fully etched silicon subwavelength structures, is proposed. Based on this material, a spot size converter that expands the transverse electric (TE) mode field profile from a 0.5 µm wide silicon wire waveguide to a 15 µm wide waveguide within a length of only 14 µm is designed. Measured insertion losses are below 1 dB in an unprecedented 130 nm bandwidth, limited by the measurement setup, with full 3D finite-difference time-domain (FDTD) simulations predicting a bandwidth in excess of 300 nm. Furthermore, the device is well suited to feed fiber-to-chip grating couplers, while requiring a footprint ten times smaller than conventional adiabatic tapers.
PB Wiely
YR 2019
FD 2019
LK https://hdl.handle.net/10630/34170
UL https://hdl.handle.net/10630/34170
LA eng
NO J. M. Luque-González, R. Halir, J. G. Wangüemert-Pérez, J. de-Oliva-Rubio, J. H. Schmid, P. Cheben, Í. Molina-Fernández, A. Ortega-Moñux. (2019). An Ultracompact GRIN-Lens-Based Spot Size Converter using Subwavelength Grating Metamaterials. Laser & Photonics Reviews, 13 (11), 1900172. https://doi.org/10.1002/lpor.201900172
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026