Actionnement et contrôle optique de matériaux hybrides photoactifs nanostructurés multifonctionnels

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The ATONAL project aims at developing micro- and nano-structured functional systems that can be optically**tuned, by exploiting the photoswitching properties of materials containing photochromic molecules such as**azobenzene derivatives. In recent years, new approaches have emerged, in the field of information and**communication technologies, based on the development of micro- and nano-structured devices (for integrated**optics, efficient light sources...) or on the use of innovative media and materials (flexible electronics, organic**optoelectronic...).**These approaches have been made possible by the technological developments that now allow matter**processing down to ultimate scales and integration of different materials in a same architecture. In this context,**the main objective of the ATONAL project is to investigate the potentiality of hybrid structures incorporating**photochromic materials for the elaboration of optically tunable devices in biomedical applications.**Materials incorporating azobenzene derivatives exhibit quite unique photomechanical responses in addition to**their photochromic properties. These deformations are directed by the light polarization and may manifest at**different scales. Coupling these compounds with other functional materials may then be envisaged as a route**for developing structures and devices that can be actuated, tuned or reconfigured by means of optical stimuli.**As a proof of concept, we will first develop simple processes to couple photoactive hybrid material layers with**usual integrated optical devices (for telecommunication application), fabricated with standard silicon**technologies. We will consider devices such as ring resonators, couplers, filters and gratings, the operation of**which critically depends on their structure. We will then characterize the control of their functioning conferred**by the photoactive material. Finally, in collaboration with the companies supporting the project, we will**explore the possibility to implement this approach into real-world devices.**