RT Journal Article
T1 Perfectly vertical surface grating couplers using subwavelength engineering for increased feature sizes.
A1 Kamandar Dezfouli, Mohsen
A1 Grinberg, Yuri
A1 Melati, Daniele
A1 Cheben, Pavel
A1 Schmid, Jens H.
A1 Sánchez-Postigo, Alejandro
A1 Ortega-Moñux, Alejandro
A1 Wanguemert-Pérez, Juan Gonzalo
A1 Cheriton, Ross
A1 Janz, Siegfried
A1 Xu, Dan-Xia
A1 Schmid, Jens H.
K1 Fotónica
K1 Óptica
K1 Optoelectrónica
AB We present perfectly vertical grating couplers for the 220 nm silicon-on-insulator platform incorporating subwavelength metamaterials to increase the minimum feature sizes and achieve broadband low back-reflection. Our study reveals that devices with high coupling efficiencies are distributed over a wide region of the design space with varied back-reflections, while still maintaining minimum feature sizes larger than 100 nm and even 130 nm. Using 3D-finite-difference time-domain simulations, we demonstrate devices with broadband low back-reflection of less than -20dB over more than 100 nm bandwidth centered around the C-band. Coupling efficiencies of 72% and 67% are achieved for minimum feature sizes of 106 nm and 130 nm, respectively. These gratings are also more fabrication tolerant compared to similar designs not using metamaterials.
PB Optica
YR 2020
FD 2020-06-29
LK https://hdl.handle.net/10630/33094
UL https://hdl.handle.net/10630/33094
LA eng
NO Mohsen Kamandar Dezfouli, Yuri Grinberg, Daniele Melati, Pavel Cheben, Jens H. Schmid, Alejandro Sánchez-Postigo, Alejandro Ortega-Moñux, Gonzalo Wangüemert-Pérez, Ross Cheriton, Siegfried Janz, and Dan-Xia Xu, "Perfectly vertical surface grating couplers using subwavelength engineering for increased feature sizes," Opt. Lett. 45, 3701-3704 (2020)
NO Política de acceso abierto tomada de: https://v2.sherpa.ac.uk/id/publication/13362
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026