46 citations · 223 across the 14 of their papers we have counts for
14 papers
Tuning single-molecule fluorescence by atomic-scale control of the local environment
Thiago G. L. Brito, Daniel Arribas, Sofia Canola +3
Molecules that absorb and emit light play a central role in microscopy, light-emitting devices and photosynthesis. Their fluorescence arises from well-defined radiative transitions…
Probing up-conversion electroluminescence of decoupled porphyrin molecules in a plasmonic nanocavity
Li-Qing Zheng, Fábio J. R. Costa, Abhishek Grewal +6
Molecular triplet states can produce significant phosphorescence and act as a relay state for luminescence, such as in up-conversion processes. While this property makes triplet em…
Single-molecule phosphorescence and intersystem crossing in a coupled exciton-plasmon system
Abhishek Grewal, Hiroshi Imada, Kuniyuki Miwa +6
Scanning the sharp metal tip of a scanning tunneling microscope (STM) over a molecule allows tuning the coupling between the tip plasmon and a molecular fluorescence emitter. This…
Scanning Tunneling Microscopy for Molecules: Effects of Electron Propagation into Vacuum
Abhishek Grewal, Christopher C. Leon, Klaus Kuhnke +2
Using scanning tunneling microscopy (STM), we experimentally and theoretically investigate isolated platinum phthalocyanine (PtPc) molecules adsorbed on atomically thin NaCl(100) v…
Anionic Character of the Conduction Band of Sodium Chloride
Christopher C. Leon, Abhishek Grewal, Klaus Kuhnke +2
The alkali halides are ionic compounds. Each alkali atom donates an electron to a halogen atom, leading to ions with full shells. The valence band is mainly located on halogen atom…
Character of electronic states in the transport gap of molecules on surfaces
Abhishek Grewal, Christopher C. Leon, Klaus Kuhnke +2
We report on scanning tunneling microscopy (STM) topographs of individual metal phthalocyanines (MPc) on a thin salt (NaCl) film on a gold substrate, at tunneling energies within t…
Atomic-scale structural fluctuations of a plasmonic cavity
Anna Rosławska, Pablo Merino, Abhishek Grewal +3
We study fluctuations in plasmonic electroluminescence at the single-atom limit profiting from the precision of a low-temperature scanning tunneling microscope. First, we investiga…
Gigahertz frame rate imaging of charge-injection dynamics in a molecular light source
Anna Rosławska, Pablo Merino, Christopher C. Leon +4
Light sources on the scale of single molecules can be addressed and characterized on their proper sub-nanometer scale by scanning tunneling microscopy induced luminescence (STML).…
Single Photon Emission from a Plasmonic Light Source Driven by a Local Field-Induced Coulomb Blockade
Christopher C. Leon, Olle Gunnarsson, Dimas G. de Oteyza +5
A hallmark of quantum control is the ability to manipulate quantum emission at the nanoscale. Through scanning tunneling microscopy induced luminescence (STML) we are able to gener…
A single hydrogen molecule as an intensity chopper in an electrically-driven plasmonic nanocavity
Pablo Merino, Anna Rosławska, Christopher C. Leon +5
Photon statistics is a powerful tool for characterizing the emission dynamics of nanoscopic systems and their photophysics. Recent advances that combine correlation spectroscopy wi…
Photon super-bunching from a generic tunnel junction
Christopher Leon, Anna Rosławska, Abhishek Grewal +3
Generating correlated photon pairs at the nanoscale is a prerequisite to creating highly integrated optoelectronic circuits that perform quantum computing tasks based on heralded s…
Single charge and exciton dynamics probed by molecular-scale-induced electroluminescence
Anna Rosławska, Pablo Merino, Christoph Große +5
Excitons and their constituent charge carriers play the central role in electroluminescence mechanisms determining the ultimate performance of organic optoelectronic devices. The i…
Absence of local magnetic moments in Ru and Rh impurities and clusters on Ag(100) and Pt(997)
J. Honolka, K. Kuhnke, L. Vitali +8
The magnetism of quench-condensed Ru and Rh impurities and metal films on Ag(100) and Pt(997) has been studied using x-ray magnetic circular dichroism. In the coverage range betwee…
Growth and surface alloying of Fe on Pt(997)
Tae-Yon Lee, Samuel Sarbach, Klaus Kuhnke +1
The growth of ultra-thin layers of Fe on the vicinal Pt(997) surface is studied by thermal energy He atom scattering (TEAS) and Auger electron spectroscopy (AES) in the temperature…