RT Journal Article
T1 Breaking the Coupling Efficiency–Bandwidth Trade-Off in Surface Grating Couplers Using Zero-Order Radiation
A1 Sánchez-Postigo, Alejandro
A1 Halir, Robert
A1 Wanguemert-Pérez, Juan Gonzalo
A1 Ortega-Moñux, Alejandro
A1 Wang, Shurui
A1 Vachon, Martin
A1 Schmid, Jens H.
A1 Xu, Dan-Xia
A1 Cheben, Pavel
A1 Molina-Fernández, Íñigo
K1 Circuitos fotónicos
AB Silicon photonics provides wafer-scale fabrication of densely integrated photonic circuits that are enabling breakthrough applications in datacom, artificial intelligence, and healthcare. The sub-micrometer mode size of silicon waveguides makes efficient coupling to conventional single mode fibers extremely challenging. While advanced surface grating couplers can achieve sub-decibel coupling efficiencies, their operation relies on diffraction phenomena, which intrinsically limit the operational bandwidth. Here a novel type of surface coupler is experimentally demonstrated that overcomes the efficiency-bandwidth limitation of conventional diffraction gratings by harnessing zero-order radiation from a subwavelength metamaterial waveguide to a tilted silicon prism. The device achieves a coupling efficiency above 80% to an SMF-28 fiber in a record 1-dB bandwidth beyond 90 nm, opening new venues for highly efficient broadband fiber-to-chip surface coupling in silicon photonics.
PB Wiley
YR 2021
FD 2021-05-05
LK https://hdl.handle.net/10630/33546
UL https://hdl.handle.net/10630/33546
LA eng
NO A. Sánchez-Postigo, R. Halir, J. G. Wangüemert-Pérez, A. Ortega-Moñux, S. Wang, M. Vachon, J. H. Schmid, D.-X. Xu, P. Cheben, Í. Molina-Fernández, Breaking the Coupling Efficiency–Bandwidth Trade-Off in Surface Grating Couplers Using Zero-Order Radiation. Laser & Photonics Reviews 2021, 15, 2000542. https://doi.org/10.1002/lpor.202000542
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026