Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 72: Poster: Scanning Probe Microscopy: Light Matter Interaction at Atomic Scales
O 72.9: Poster
Mittwoch, 20. März 2024, 18:00–20:00, Poster D
Excitation of single 4f metal-organic molecules with light — •Adrian Ebert1, Lukas Gerhard1, Lia Mayer1, Shuran Liu1, Marjan Krstic2, Barbora Brachnakova3, Senthil Kumar Kuppusamy3, Julia Feye4, Peter W. Roesky4, and Wulf Wulfhekel1 — 1Institute for Quantum Materials and Technology, KIT — 2Institute for Theoretical Solid State Physics, KIT — 3Institute of Nanotechnology, KIT — 4Institute for Organic Chemistry, KIT
We study light emitting 4f metal-organic complexes in a low temperature, ultra-high vacuum scanning tunneling microscope (STM). While the system has been successfully used to couple light out emitted from single molecules, it's also suitable to couple light in using the same optical path. The addition of a pulsed light source for coupling light into the STM junction will greatly extend the possibilities to study the exciton dynamics.
4f metal-organic complexes have an immense advantage in comparison to purely organic chromophores or chromophores based on d-electrons, because the 4f states are highly localized hampering non-radiative recombination leading to long lifetimes of the excited states. They combine the extremely sharp emission lines including spin-orbit coupling and hyperfine coupling with functionalization by the ligands to enhance the coupling to the photon field. In future opto-electronic quantum devices the complexes can act as single photon emitters and their up- and down-conversion can be used to couple photons of different wavelength.