Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 60: Organic Molecules on Inorganic Substrates IV: Electronic Properties, Excitations, Dynamics
O 60.4: Vortrag
Mittwoch, 3. April 2019, 15:45–16:00, H24
Single photon plasmonic emission from STM-induced quantum dots — •Christopher C. Leon1, Dimas G. de Oteyza2,3,4, Anna Rosławska1, Pablo Merino1,5, Abhishek Grewal1, Klaus Kuhnke1, and Klaus Kern1,6 — 1Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany. — 2Donostia International Physics Center, San Sebastian, Spain. — 3Centro de Fisica de Materiales, CSIC-UPV/EHU, San Sebastian, Spain. — 4Ikerbasque, Basque Foundation for Science, Bilbao, Spain. — 5present address: Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, Spain. — 6Institut de Physique, École Polytechnique Fédérale de Lausanne, Switzerland.
A hallmark of quantum control is the ability to make photons at the nanoscale whose temporal features are distinct from classical light sources. Through scanning tunneling microscopy induced luminescence (STML) we are able to generate plasmonic light originating from inelastic tunneling processes that occur in few-nanometer thick molecular films of C60 deposited on Ag(111). This light is antibunched with a 1/e recovery time of less than one nanosecond, as shown through Hanbury Brown and Twiss photon intensity interferometry. These phenomena are attributed to a Coulomb blockade that occurs when tunneling electrons are forced to hop through a discrete quantum state that is created from the strong electric field of the tip and its confinement effects. The spatial extent of this state can be varied by adjusting the degree of band bending through the sample.