Strong Coupling Between Plasmons and Molecular Excitons in Metal–Organic Frameworks

Autor:	Thaddeus Reese, Jun Guan, George C. Schatz, Francisco Freire-Fernández, Teri W. Odom, Richard D. Schaller, Alexander D. Sample, Charles Cherqui, Jingtian Hu, Jeong-Eun Park
Rok vydání:	2021
Předmět:	Condensed Matter::Quantum Gases Mechanical Engineering Exciton Crystal system Physics::Optics Bioengineering General Chemistry Condensed Matter Physics Molecular physics Dipole Ultrafast laser spectroscopy Polariton General Materials Science Spectroscopy Refractive index Plasmon
Zdroj:	Nano Letters. 21:7775-7780
ISSN:	1530-6992 1530-6984
DOI:	10.1021/acs.nanolett.1c02740
Popis:	This Letter describes strong coupling of densely packed molecular emitters in metal-organic frameworks (MOFs) and plasmonic nanoparticle (NP) lattices. Porphyrin-derived ligands with small transition dipole moments in an ordered MOF film were grown on Ag NP arrays. Angle-resolved optical measurements of the MOF-NP lattice system showed the formation of a polariton that is lower in energy and does not cross the uncoupled MOF Q1 band. Modeling predicted the upper polariton energy and a calculated Rabi splitting of 110 meV. The coupling strength was systematically controlled by detuning the plasmon energy by changing the refractive index of the solvents infiltrating the MOF pores. Through transient absorption spectroscopy, we found that the lower polariton decays quickly at shorter time scales (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1caf699a013b8db1bd6688d6addc7293 https://doi.org/10.1021/acs.nanolett.1c02740 Zobrazit plný text záznamu