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| Type |
Symposium |
| Area |
Recent Trends in Time- and Spatial-resolved Spectromicroscope |
| Room No. |
Room 402 |
| Time |
THU 17:40-: |
| Code |
PHYS1-6 |
| Subject |
Sub-10 Femtosecond Time-Resolved Vibronic Optical Microscopy |
| Authors |
Jong Min Lim, Philipp Kukura1,*
Department of Chemistry, Korea University, Korea
1Department of Chemistry, University of Oxford, United Kingdom
|
| Abstract |
A 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 is introduced. We demonstrate the capabilities of our system by reporting the spatially- and spectrally-resolved transient electronic response of MAPbI3−xClx 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 resolution covering the 100−2000 cm−1 window. Our approach opens up the possibility of studying ultrafast dynamics on nanometer length and femtosecond time scales in a variety of two-dimensional and nanoscopic systems. |
| E-mail |
jongmin211@gmail.com |
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121st General Meeting of the KCS