Unambiguous determination of the optical dynamics in MXenes is necessary for their reliable development into applications such as EMI shielding, energy storage, and laser systems. Here, simultaneous ultrafast transmission and reflection (SUTR) is used to determine the temporal change in refractory index (n) and extinction coefficient (k) of Ti3C2Tx from 450 to 1300 nm which is dominated by intraflake mechanisms. We assign the dynamics for wavelengths below 600 nm with interband transitions, while those at 800 nm are assigned to a plasmon resonance. The response from 1000 to 1300 nm shows changes in index of refraction with no changes in extinction coefficient, consistent with free carriers.
- Simultaneous ultrafast transmission and reflection
- Surface plasmon
ASJC Scopus subject areas
- Materials Science(all)