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

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Abstract

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
Volume1289
Edition1
DOIs
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

Conference

Conference24th International Conference on Spectral Line Shapes, ICSLS 2018
CountryIreland
CityDublin
Period17/06/201822/06/2018

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