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Strong Coupling Between Molecules and Vacuum Fields: New Molecular Properties

Total Cost €


EC-Contrib. €






Project "STRONG" data sheet

The following table provides information about the project.


Organization address
postcode: 405 30

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Sweden [SE]
 Total cost 1˙500˙000 €
 EC max contribution 1˙500˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2017-STG
 Funding Scheme ERC-STG
 Starting year 2018
 Duration (year-month-day) from 2018-02-01   to  2023-01-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    GOETEBORGS UNIVERSITET SE (GOETEBORG) coordinator 1˙500˙000.00


 Project objective

Chemistry has had profound impact on society during the last two centuries. From mass production of drugs and pigments, to the invention of plastics, and more recently with the introduction of molecular electronics. However, some basic physical laws govern possible utilizations. It is therefore of great importance to examine how to bend these laws, how to bypass them and by so doing open up new opportunities for novel applications.

A central physical property of the molecule is its ability to interact with light. Plant leaves are green because they absorb light. However, less known is that this light-matter interaction can be enhanced to the point where it is so strong so that the photon and molecule cannot be regarded as separate entities, but as a system with unique properties. So called strong coupling occurs when exchange of energy between light and matter is stronger than any dissipation process and it leads to the formation of hybrid states with new physical and chemical properties.

STRONG will use a chemical viewpoint to develop unique molecules optimized for strong light-matter interactions, and with these examine excited state processes of strongly coupled systems. My aim is to demonstrate that strong light-matter coupling enables selective manipulation of energy levels. By so doing I will allow for a singlet ground and first excited state, thus challenge Hund’s rule and change how the basic rules of electronic state energetics are envisioned. This enables channelling of all excitation energy, irrespectively of origin, through a singlet pathway, which is of great technological importance in organic electronics. Furthermore, I will use reversible oriented molecules to enhance the coupling and for the first time examine the relationship between orientation of molecules and strong light-matter coupling. Also the ability of light-matter interactions to increase order of an ensemble of molecules, which has profound technological applications, will be explored.


year authors and title journal last update
List of publications.
2019 A. Cravcenco, M. Hertzog, C. Ye, M. N. Iqbal, U. Mueller, L. Eriksson, K. Börjesson
Multiplicity conversion based on intramolecular triplet-to-singlet energy transfer
published pages: eaaw5978, ISSN: 2375-2548, DOI: 10.1126/sciadv.aaw5978
Science Advances 5/9 2019-10-15
2019 Manuel Hertzog, Mao Wang, Jürgen Mony, Karl Börjesson
Strong light–matter interactions: a new direction within chemistry
published pages: 937-961, ISSN: 0306-0012, DOI: 10.1039/c8cs00193f
Chemical Society Reviews 48/3 2019-10-15
2018 Kati Stranius, Manuel Hertzog, Karl Börjesson
Selective manipulation of electronically excited states through strong light–matter interactions
published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-018-04736-1
Nature Communications 9/1 2019-10-15
2019 Chen Ye, Victor Gray, Jerker Mårtensson, Karl Börjesson
Annihilation Versus Excimer Formation by the Triplet Pair in Triplet–Triplet Annihilation Photon Upconversion
published pages: 9578-9584, ISSN: 0002-7863, DOI: 10.1021/jacs.9b02302
Journal of the American Chemical Society 141/24 2019-10-15
2019 Khushbu Kushwaha, Liyang Yu, Kati Stranius, Sandeep Kumar Singh, Sandra Hultmark, Muhammad Naeem Iqbal, Lars Eriksson, Eric Johnston, Paul Erhart, Christian Müller, Karl Börjesson
A Record Chromophore Density in High-Entropy Liquids of Two Low-Melting Perylenes: A New Strategy for Liquid Chromophores
published pages: 1801650, ISSN: 2198-3844, DOI: 10.1002/advs.201801650
Advanced Science 6/4 2019-10-15

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