Periodic Reporting for period 2 - CHANSON (Chiral semiconductor nanophotonics for ultraresolved molecular sensing)
Période du rapport: 2022-06-01 au 2023-11-30
This project tackles the challenge of increasing the sensitivity of chiral molecular detection using semiconductor nanophotonics through new contrast mechanisms relying on fluorescence instead of absorption. The project exploits two approaches based on nanophotonic and excitonic sensors around the following challenges:
A) Detecting the lowest possible concentration of chiral molecules targeting the limit of a single molecule.
B) Exploiting excitons in atomically thin semiconductors as sensors for nanoscale imaging.
Regarding exciton-based nanoscale sensors, we observed localized fluorescence fluctuations in a monolayer semiconductor due to interaction with its environment. We adapted a fluctuation-based super-resolution technique to image localized exciton fluctuations in monolayer semiconductors and map disorder on the monolayer. We correlated the fluorescence fluctuations with features measured by atomic force microscopy and compared them with hyperspectral imaging data.