Speaker
Description
Two-dimensional electronic spectroscopy (2DES) has proven to be a powerful tool for studying electronic structure and ultrafast dynamics in a wide range of systems, including natural and artificial light-harvesting complexes, solar cells, molecular systems, quantum dots, and polymers. Fluorescence-detected 2DES (F-2DES) has been shown to provide complementary information to its coherently detected counterpart and easy integration with a microscope for spatially-resolved measurements. To date, the bandwidth of many 2DES and F-2DES methods has been limited by various aspects of their experimental implementation, such as pulse shapers and acousto-optic modulators (AOMs). We will present a rapid-scanning approach to F-2DES that does not rely on such implementations and thus allows broadband implementation. Building on recent work, this approach uses the velocities of the time-delay stages to shift the signals of interest above the 1/f laser noise and interferometrically track the time delays to enable the correction of spectral phase distortions. Isolation of various signal contributions is achieved directly via analysis of the collected time-domain data. Removing the need for AOMs or pulse shapers enables reduced dispersion in the setup, increases the power throughput, and allows one to measure broadband 2D spectra within the fraction of the time compared to established 2D setups. We will demonstrate this method on a laser dye using a broadband continuum light source.
| Keyword-1 | Electronic spectroscopy |
|---|---|
| Keyword-2 | Ultrafast dynamics |
| Keyword-3 | 2DES |