Nonlinear vortex dichroism in chiral molecules

Cheeseman, Luke and Forbes, Kayn A. ORCID: https://orcid.org/0000-0002-8884-3496 (2024) Nonlinear vortex dichroism in chiral molecules. Advanced Optical Materials. ISSN 2195-1071

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Abstract

The recent discovery that linearly polarized light with a helical wavefront can exhibit vortex dichroism (also referred to as helical dichroism) has opened up new horizons in chiroptical spectroscopy with structured chiral light. Recent experiments have now pushed optical activity with vortex beams into the regime of nonlinear optics. Here the theory of two-photon absorption (TPA) of focused optical vortices by chiral molecules: nonlinear vortex dichroism (NVD) is presented. It is discovered that highly distinct features arise in the case of TPA with focused vortex beams, including the ability to probe chiral molecular structure not accessible to current methods and that the differential rate of TPA is significantly influenced by the orientation of the state of linear polarization. This study provides strong evidence that combining nonlinear optical activity with structured light provides new and improved routes to studying molecular chirality.

Item Type:	Article
Uncontrolled Keywords:	chirality,nonlinear optics,optical activity,optical vortices,structured light,electronic, optical and magnetic materials,atomic and molecular physics, and optics ,/dk/atira/pure/subjectarea/asjc/2500/2504
Faculty \ School:	Faculty of Science > School of Chemistry, Pharmacy and Pharmacology
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	17 Dec 2024 01:42
Last Modified:	03 Jan 2025 01:04
URI:	https://ueaeprints.uea.ac.uk/id/eprint/98010
DOI:	10.1002/adom.202402151

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