Length : 36 months
Starting date : 10/2018
Working time : Full time
Salary : 21 222.6 euros/year (gross salary)
Diploma : Master Degree
Mie Resonators (MRs) based on dielectric materials represent an extremely young and promising research topic, with huge applicative potentials in photonics and optics. Based on arrays of sub-micrometric particles that are capable of efficient light manipulation at visible and near-infrared frequencies, these optical systems offer convenient and miniaturised alternatives to complex ones, such as Bragg mirrors, anti-reflection coatings, lenses, controlled light extraction, or graded-index tapered nanostructures for instance. This unique ability to manipulate light is due to a strong modification of the local density of optical states that is favoured with sub-micrometric objects of high dielectric constant materials. Initial studies of the past few years concentrated on Si (silicon) systems, and have shown that MRs could outperform plasmonic nanoparticles. However, the strong optical losses associated with silicon’s high absorption coefficient significantly limit their potential applicability. Furthermore, nanofabrication of Si-based MRs relies on specific top-down fabrication technologies, which are impossible to scale-up at affordable prices, and which are not adapted to prepare 3D systems. TITANIDE proposes to address both of these drawbacks by developing methods to elaborate dielectric oxide (TiO2) Mie resonators in 2D and 3D architectures through a delicate combination between sol-gel chemistry and soft-Nano-Imprint Lithography (soft-NIL) processing. It will be completed by the detailed investigations of the associated optical properties and functionalities and by their implementation in selected domains of application.
TITANIDE is organised in 3 tasks that address fundamental, experimental, technological, and applied aspects; and that will be successful if a strong collaboration between materials chemists, experts in micro-/nano-fabrication, and spectroscopy is established. The work plan is briefly exposed below. Tasks are interdependent and requires that they run more or less in parallel