RT Journal Article
T1 Subwavelength engineering and asymmetry: two efficient tools for sub-nanometer-bandwidth silicon Bragg filters
A1 Oser, Dorian
A1 Pérez-Galacho, Diego
A1 Alonso-Ramos, Carlos
A1 Le Roux, Xavier
A1 Tanzilli, Sébastien
A1 Vivien, Laurent
A1 Labonté, Laurent
A1 Cassan, Éric
K1 Comunicaciones ópticas
AB Bragg filters stand as a key building blocks of the silicon- on-insulator (SOI) photonics platform, allowing the implementation of advanced on-chip signal manipulation. However, achieving narrowband Bragg filters with large rejection levels is often hindered by fabrication constraints and imperfections. Here, we show that the combination of single-side corrugation asymmetry and subwavelength engineering provides narrowband response with large corrugations, overcoming minimum feature size constraints of conventional Si Bragg filters. We comprehensively study the impact of the corrugation asymmetry in conventional and subwavelength single- etched SOI Bragg filters, showing their potential for bandwidth reduction. Finally, we experimentally demonstrate a novel subwavelength geometry, based on shifted corrugation teeth, achieving null-to-null bandwidths and rejections of 0.8 nm and 40 dB for the symmetric configuration, and 0.6 nm and 15 dB for the asymmetric case.
PB Optical Publishing Group
YR 2018
FD 2018-07-02
LK https://hdl.handle.net/10630/33938
UL https://hdl.handle.net/10630/33938
LA eng
NO Dorian Oser, Diego Pérez-Galacho, Carlos Alonso-Ramos, Xavier Le Roux, Sébastien Tanzilli, Laurent Vivien, Laurent Labonté, and Éric Cassan, "Subwavelength engineering and asymmetry: two efficient tools for sub-nanometer-bandwidth silicon Bragg filters," Opt. Lett. 43, 3208-3211 (2018)
NO Agence National pour la Recherche, Project SITQOM (DS0710).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 3 mar 2026