Asymmetric photoelectron emission from chiral molecules using a high repetition rate laser

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In the chiro-optical phenomenon known as photoelectron circular dichroism, the angular distribution of electrons ionized from chiral molecules by circularly polarized light pulses has been found to be anti-symmetric with respect to the direction of the light propagation. To study this phenomenon, chiral molecules were multiphoton ionized with a femtosecond laser in our laboratory. Using a simple stereo-detection setup, direct measurements of the asymmetry for the exemplar aromatic chiral molecule 1-phenylethanol were made using 260 nm pulses produced at a rate of 1 MHz. It was found that the asymmetry had a linear dependence on Stokes' S3 parameter indicating that the photoelectron circular dichroism is due to a single photon process from the excited state of the molecule. This is in contrast to previous and new results for camphor where a more complex dependence on S3 suggested that selective excitation of molecules with certain orientations was influential.

Original languageEnglish
Title of host publicationJournal of Physics Conference Series
Publication statusPublished - 23 Aug 2019
Event24th International Conference on Spectral Line Shapes, ICSLS 2018 - Dublin, Ireland
Duration: 17 Jun 201822 Jun 2018

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Publishing Ltd.
ISSN (Print)1742-6588


Conference24th International Conference on Spectral Line Shapes, ICSLS 2018


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