2022/11/15 by Jiaan Cao, Cao, Jiaan, Lyuzhou Ye +7
Chemistry · Physics and Astronomy · #Chemical Physics (physics.chem-ph) #Chemistry #Circular dichroism #Computer science #FOS: Physical sciences #Femtosecond #Laser #Magnet #Magnetic circular dichroism #Materials science #Molecular spectroscopy and chirality #Nanosecond #Nuclear magnetic resonance #Optics #Orbital Angular Momentum in Optics #Physics #SIGNAL (programming language) #Spectral line #Spectroscopy and Quantum Chemical Studies #Ultrashort pulse
paper · pdf · doi:10.48550/arxiv.2211.07839
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2022/11/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Magnetic circular dichroism (MCD) is a widely used spectroscopic technique which reveals valuable information about molecular geometry and electronic structure. However, the weak signal and the necessary strong magnets impose major limitations on its application. We propose a novel protocol to overcome these limitations by using pulsed vector beams (VBs), which consist of nanosecond gigahertz pump and femtosecond UV-Vis probe pulses. By virtue of the strong longitudinal electromagnetic fields, the MCD signal detected by using the pulsed VBs is greatly enhanced compared to conventional MCD performed with plane waves. Furthermore, varying the pump-probe time delay allows to monitor the ultrafast variation of molecular properties.