Theory and Design of All-Dielectric High-Q Optical Cavities and Metasurfaces

Description : All-dielectric optical nanostructures and metasurfaces are efficient tools for tailoring light properties since they exhibit weak optical losses and can host optical resonances. Their numerical design and optimization turns out to be of the uppest importance for achieving the targeted optical performances.

Research project : In the framework of this project involving all-dielectric optically resonant nanostructures, two different applications will be addressed. The first will aim at designing transmission spectral optical filters based on all-dielectric high quality factor optical nanostructured cavities. The challenge will consist in associating high quality factor with acceptable angular tolerances and high transmission efficiency. The second application will target the design of all-dielectric metasurfaces. A particular attention will be brought on the singularities of the scattering matrix elements of the metasurface. The spectral response of the metasurface will be optimized and analyzed in the framework of the singularity expansion method and inverse design will be implemented for achieving the optimal design.

Direction : Interested candidates should send their detailed CV and motivations to Anne-Laure Fehrembach and Nicolas Bonod.