Sub-10 fs Time-Resolved Vibronic Optical Microscopy.

ABSTRACT: We introduce femtosecond wide-field transient absorption microscopy combining sub-10 fs pump and probe pulses covering the complete visible (500-650 nm) and near-infrared (650-950 nm) spectrum with diffraction-limited optical resolution. We demonstrate the capabilities of our system by reporting the spatially- and spectrally-resolved transient electronic response of MAPbI_3-xCl_x perovskite films and reveal significant quenching of the transient bleach signal at grain boundaries. The unprecedented temporal resolution enables us to directly observe the formation of band-gap renormalization, completed in 25 fs after photoexcitation. In addition, we acquire hyperspectral Raman maps of TIPS pentacene films with sub-400 nm spatial and sub-15 cm^-1 spectral resoluti

SUBMITTER: Schnedermann C 

PROVIDER: S-EPMC5684689 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature