LE ROUX , Xavier

Waveguide Bragg grating filters with narrow bandwidths and high optical rejections are key functions for several advanced silicon photonics circuits. Here, we propose and demonstrate a new, to the best of our knowledge, Bragg grat- ing geometry that provides a narrowband and high rejection response. It combines the advantages of subwavelength...

International audience

International audience

International audience

The high index contrast of the silicon-on-insulator (SOI) platform allows the realization of ultra-compact photonic circuits. However, this high contrast hinders the implementation of narrow-band Bragg filters. These typically require corrugations widths of a few nanometers or double-etch ge-ometries, hampering device fabrication. Here we...

Abstract Selective optical filters with high rejection levels are of fundamental importance for a wide range of advanced photonic circuits. However, the implementation of high‐rejection on‐chip optical filters is seriously hampered by phase errors arising from fabrication imperfections. Due to coherent interactions, unwanted phase‐shifts result...

INRA has released the results of a multidisciplinary scientific assessment on the relationships between agriculture and biodiversity. Commissioned by the French ministries of agriculture and ecology, the assessment should be seen against the backdrop of a global challenge - stemming the loss of biodiversity – and approaching deadlines for...

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Cette Expertise Scientifique Collective (ESCo), réalisée à la demande des ministères de l'agriculture et de l'écologie, intervient dans un contexte marqué par un très fort intérêt porté à la biodiversité, désormais considérée comme un enjeu d'importance majeure. Cet intérêt est né du constat de la perte actuelle de biodiversité (liée, entre...

International audience

Sub-wavelength grating (SWG) metamaterials have garnered a great interest for their singular capability to shape the propagation of light. However, practical SWG implementations are limited by fabrication constraints, such as minimum feature size. Here, we present a new nanophotonic waveguide grating concept that exploits phase-matching...