Domaines
Low dimension physics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type de stage
Expérimental Description
Quantum dots, thanks to quantum confinement, offer an interesting playground for optoelectronics. In the visible range, they have already reached commercial status as light sources for displays, and current efforts now focus on the infrared range. Films of such colloidal quantum dots offer a strategy for cost disruption, while infrared optoelectronics has historically been prohibitive. However, their polycrystalline nature tends to limit carrier diffusion length; therefore, to efficiently absorb and photoconduct, they must be coupled to a photonic structure whose role is to focus light onto a thin film of such quantum dots. This concept is now established, and our group aims to go further through the introduction of post-fabrication reconfigurable structures, where the spectral response can be tuned via the application of a bias.
In this project, we aim to design new photonic structures that enable control of linewidth and absorption directivity. In the long term, the project could also shift toward light emission, depending on the applicant’s interests.
Contact
Emmanuel Lhuillier