Séminaire de Tomas Neuman : From plasmon-mediated molecular spectroscopy to molecular quantum technologies ISMO, 10 novembre 2020-10 novembre 2020, Privas.
Séminaire de Tomas Neuman : From plasmon-mediated molecular spectroscopy to molecular quantum technologies
ISMO, le mardi 10 novembre à 11:00
From plasmon-mediated molecular spectroscopy to molecular quantum technologies
### par Tomas Neuman
_Institut de physique et de chimie des Matériaux de Strasbourg (IPCMS)_
Vibrational, electronic, and spin excitations in molecules can identify molecules in spectroscopy, but also play a role in molecular chemical reactivity, or find technological applications e.g. in superresolution microscopy or infrared-to-optical transduction. Recently, excitations in single molecules and molecular networks have been proposed to serve as physical platforms for qubits or for nanoscale sources of non-classical photon states. To fully take advantage of the molecular platforms it is therefore necessary to elucidate how molecular excitations can be detected, engineered, and controlled, especially on the single- or a few-molecular scale. I will discuss how nanoscale metallic structures supporting collective electronic excitations – plasmons – can be used to enhance the interaction between photons and molecular excitations and thus detect and control them. I will show that plasmon-enhanced infrared and optical vibrational spectroscopies or electroluminescence enhanced by effective plasmonic cavities formed in tunneling metallic gaps can be used to detect and manipulate molecular states, or break well-established spectroscopic selection rules. Full understanding of the plasmon-mediated light-matter interactions also enables novel spectroscopic methods exploiting the correlated information about transport and optical properties of molecules. A particular example of the electroluminescence spectroscopy in scanning tunneling microscope used to elucidate the tautomerization dynamics in free-base phthalocyanine molecules will be discusse. Finally, I will elaborate on the potential of molecules for quantum technologies and the role of plasmon-mediated molecular spectroscopy in this field.
[Présentation du séminaire sur le site de l’ISMO](https://eu.bbcollab.com/guest/5399568bae8444d4a201e97bf0ed0284)
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