Time-resolved second harmonic generation with single-shot phase sensitivity

Tyson, Alexandra L.; Woods, David A.; Verlet, Jan R.R.

Abstract

A time-resolved, phase-sensitive second harmonic generation (SHG) method to probe the excited state dynamics of interfacial species is presented. It is based on an interference measurement between the SHG from a sample and a local oscillator generated at a reference surface in which an entire interference pattern is recorded in a single shot by using a spatially varying phase unit comprised of a pair of wedges that sandwich the reference sample. In combination with 30 kHz modulation of the experiment, shot-to-shot pump-probe measurements are presented. The technique is characterised by measuring the time-resolved change in the amplitude and phase of the interference pattern due to the excited state dynamics of the dye malachite green at the air/water interface. The key attributes of the technique are its excellent phase stability and sensitivity, and relatively short data acquisition times.

Citation

Tyson, A. L., Woods, D. A., & Verlet, J. R. (2018). Time-resolved second harmonic generation with single-shot phase sensitivity. The Journal of Chemical Physics, 149(20), Article 204201. https://doi.org/10.1063/1.5061817

• Journal Article Type: Article
• Acceptance Date: Nov 2, 2018
• Online Publication Date: Nov 28, 2018
• Publication Date: Nov 28, 2018
• Deposit Date: Dec 6, 2018
• Publicly Available Date: Dec 7, 2018
• Journal: Journal of Chemical Physics
• Print ISSN: 0021-9606
• Electronic ISSN: 1089-7690
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 149
• Issue: 20
• Article Number: 204201
• DOI: https://doi.org/10.1063/1.5061817
• Public URL: https://durham-repository.worktribe.com/output/1312248