Strong coupling of collective intermolecular vibrations in organic materials at terahertz frequencies

Ran Damari, Omri Weinberg, Daniel Krotkov, Natalia Demina, Katherine Akulov, Adina Golombek, Tal Schwartz*, Sharly Fleischer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Scopus citations


Several years ago, strong coupling between electronic molecular transitions and photonic structures was shown to modify the electronic landscape of the molecules and affect their chemical behavior. Since then, this concept has evolved into a new field known as polaritonic chemistry. An important ingredient in the progress of this field was the demonstration of strong coupling with intra-molecular vibrations, which enabled the modification of processes occurring at the electronic ground-state. Here we demonstrate strong coupling with collective, inter-molecular vibrations occurring in organic materials in the low-terahertz region (≲ 1012 Hz). Using a cavity filled with α-lactose molecules, we measure the temporal evolution and observe coherent Rabi oscillations, corresponding to a splitting of 68 GHz. These results take strong coupling into a new class of materials and processes, including skeletal polymer motions, protein dynamics, metal organic frameworks and other materials, in which collective, spatially extended degrees of freedom participate in the dynamics.

Original languageEnglish
Article number3248
JournalNature Communications
Issue number1
StatePublished - 1 Dec 2019


FundersFunder number
Wolfson FoundationPR/ec/20419
Israel Science Foundation2797/11, 926/18, 1065/14
Ministry of Science and Technology, Israel
Wolfson Family Charitable Trust
Israel National Research Center for Electrochemical Propulsion1241/13, PR/eh/21797


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