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Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
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Time-Resolved Measurement of Ultrafast, Weak Electric Fields Signals in Degenerate Four-Wave Mixing Schemes

Poster 36
Presenter: George J Economou (Purdue University)
Authors: Yuyan Zhong (Purdue University), Francis Walz (Purdue University), Niranjan Shivaram (Purdue University)

Nonlinear optical spectroscopic techniques are ubiquitous tools in the study of ultrafast electron dynamics in molecules. By combining well-known four-wave mixing schemes such as Degenerate Four-Wave Mixing (DFWM) and spectral interferometry, ultraweak, ultrafast signals carrying information on ultrafast dynamics can be measured. We demonstrate that with DWFM in a conventional BoxCARS configuration, spectral interferometry can be used to measure nonlinear signal electric fields with attosecond time delay resolution between input pulses. We further use this approach to measure electric field of nonlinear signals from molecules such as ethylene excited to electronic states using femtosecond ultraviolet pulses.

Funding acknowledgement

This material is based upon work supported by the National Science Foundation under Grant No. 2208061.

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