Open AccessDirect Transition from Triplet Excitons to Hybrid Light–Matter States via Triplet–Triplet Annihilation
Author(s) -
Chen Ye,
Suman Mallick,
Manuel Hertzog,
Markus Kowalewski,
Karl Börjesson
Publication year - 2021
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.1c02306
Subject(s) - photon upconversion , annihilation , chemistry , chemical physics , photon , exciton , exothermic reaction , endothermic process , state of matter , optoelectronics , physics , condensed matter physics , quantum mechanics , ion , organic chemistry , adsorption
Strong light-matter coupling generates hybrid states that inherit properties of both light and matter, effectively allowing the modification of the molecular potential energy landscape. This phenomenon opens up a plethora of options for manipulating the properties of molecules, with a broad range of applications in photochemistry and photophysics. In this article, we use strong light-matter coupling to transform an endothermic triplet-triplet annihilation process into an exothermic one. The resulting gradual on-off photon upconversion experiment demonstrates a direct conversion between molecular states and hybrid light-matter states. Our study provides a direct evidence that energy can relax from nonresonant low energy molecular states directly into hybrid light-matter states and lays the groundwork for tunable photon upconversion systems that modify molecular properties in situ by optical cavities rather than with chemical modifications.