Speaker
Description
Two-dimensional electronic spectroscopy (2DES) has emerged as a fundamental technique to study ultrafast electronic structure, coherence, as well as energy and charge transfer in molecular systems. Correlating excitation and detection frequencies with femtosecond time resolution, 2DES is uniquely capable of providing comprehensive insight into electronic couplings and nonequilibrium dynamics. However, the performance of 2DES experiments is fundamentally limited by the spectral amplitude and phase properties of the ultrashort laser pulse sequence that creates the nonlinear signal. Pulse shaping is becoming an increasingly important topic as 2DES continues to push towards broader bandwidths and higher temporal resolution.
Ultrafast pulse shaping allows the manipulation of the spectral amplitude and phase of ultrashort laser pulses. In combination with pulse shaping, Multiphoton Intrapulse Interference Phase Scan (MIIPS) provides a powerful, adaptive approach to characterization and compensation of higher-order spectral phase distortions. Unlike purely diagnostic techniques, MIIPS enables iterative dispersion correction directly at the sample plane to ensure near–transform-limited pulses across the full laser bandwidth. This is particularly important when using broadband femtosecond light sources, where residual dispersion and phase distortions can significantly degrade temporal resolution and signal fidelity. We present our work employing a 4-f pulse-shaper in combination with MIIPS to optimize various broadband continuum sources for 2DES experiments.
| Keyword-1 | MIIPS |
|---|---|
| Keyword-2 | Pulse Compression |