Thomas Schachinger
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View article: Probing Optical Magnetic Dipole Transitions in Eu <sup>3+</sup> Using Structured Light and Nanoscale Sample Engineering
Probing Optical Magnetic Dipole Transitions in Eu <sup>3+</sup> Using Structured Light and Nanoscale Sample Engineering Open
At optical frequencies, interactions of the electric field component of light with matter dominate, whereas magnetic dipole transitions are inherently weak and challenging to access independently of electric dipole transitions. However, ma…
View article: Ghost Imaging with Free Electron-Photon Pairs
Ghost Imaging with Free Electron-Photon Pairs Open
Coincidence imaging, also known as ghost imaging, is a technique that exploits correlations between two particles to reconstruct information about a specimen. The particle that relays the spatial information about the object remains comple…
View article: Probing Optical Magnetic Dipole Transitions in Eu$^{3+}$ using Structured Light and Nanoscale Sample Engineering
Probing Optical Magnetic Dipole Transitions in Eu$^{3+}$ using Structured Light and Nanoscale Sample Engineering Open
At optical frequencies, interactions of the electric field component of light with matter are dominating, whereas magnetic dipole transitions are inherently weak and challenging to access independently from electric dipole transitions. How…
View article: Exploring Single-Photon Recoil on Free Electrons
Exploring Single-Photon Recoil on Free Electrons Open
Recent advancements in time-resolved electron and photon detection enable novel correlative measurements of electrons and their associated cathodoluminescence (CL) photons within a transmission electron microscope. These studies are pivota…
View article: Exploring single-photon recoil on free electrons
Exploring single-photon recoil on free electrons Open
Recent advancements in time-resolved electron and photon detection enable novel correlative measurements of electrons and their associated cathodoluminescence (CL) photons within a transmission electron microscope. These studies are pivota…
View article: Electro-tuned catalysts: voltage-controlled activity selection of bimetallic exsolution particles
Electro-tuned catalysts: voltage-controlled activity selection of bimetallic exsolution particles Open
Controlling the surface state of bimetallic exsolution nanoparticles to either enhance or inhibit the reaction kinetics of H 2 oxidation/H 2 O splitting by applying a voltage.
View article: Bimetallic CuPd nanoparticles supported on ZnO or graphene for CO<sub>2</sub> and CO conversion to methane and methanol
Bimetallic CuPd nanoparticles supported on ZnO or graphene for CO<sub>2</sub> and CO conversion to methane and methanol Open
CO 2 and CO valorization to methanol and methane over Cu or CuPd nanoparticles supported on ZnO or graphene. The catalysts demonstrate high efficiency, favouring methane at lower metal loading but methanol at high copper content.
View article: Hierarchically Porous Ceramic and Metal‐Ceramic Hybrid Materials Structured by Vat Photopolymerization‐Induced Phase Separation
Hierarchically Porous Ceramic and Metal‐Ceramic Hybrid Materials Structured by Vat Photopolymerization‐Induced Phase Separation Open
Additive manufacturing techniques such as vat photopolymerization have laid the foundation for impressive advances in the 3D structuring of ceramic materials. However, simultaneous structuring of these complex‐shaped ceramic objects on the…
View article: Lorentz near-field electron ptychography
Lorentz near-field electron ptychography Open
Over the past few years, electron ptychography has drawn considerable attention for its ability to recover high contrast and ultra-high resolution images without the need for high quality electron optics. In this Letter, we focus on electr…
View article: Magnetic Phase Imaging using Lorentz Near-field Electron Ptychography
Magnetic Phase Imaging using Lorentz Near-field Electron Ptychography Open
Over the past few years, the combination of diffuser and near-field electron ptychography has drawn more attention by its ability to recover large field of view with few diffraction patterns. In this paper, we purpose a novel design and im…
View article: A quantum logic gate for free electrons
A quantum logic gate for free electrons Open
The topological charge of vortex electrons spans an infinite-dimensional Hilbert space. Selecting a two-dimensional subspace spanned by , a beam electron in a transmission electron microscope (TEM) can be considered as a quantum bit (qubi…
View article: A quantum logic gate for free electrons
A quantum logic gate for free electrons Open
The topological charge $m$ of vortex electrons spans an infinite-dimensional Hilbert space. Selecting a two-dimensional subspace spanned by $m=\pm 1$, a beam electron in a transmission electron microscope (TEM) can be considered as a quant…
View article: Discrimination of coherent and incoherent cathodoluminescence using temporal photon correlations
Discrimination of coherent and incoherent cathodoluminescence using temporal photon correlations Open
We present a method to separate coherent and incoherent contributions of cathodoluminescence (CL) by using a time-resolved coincidence detection scheme. For a proof-of-concept experiment, we generate CL by irradiating an optical multimode …
View article: True Nature of the Transition-Metal Carbide/Liquid Interface Determines Its Reactivity
True Nature of the Transition-Metal Carbide/Liquid Interface Determines Its Reactivity Open
Compound materials, such as transition-metal (TM) carbides, are anticipated to be effective electrocatalysts for the carbon dioxide reduction reaction (CO2RR) to useful chemicals. This expectation is nurtured by density functional theory (…
View article: Experimental Realisation of a \pi/2 Vortex Mode Converter for Electrons Using a Spherical Aberration Corrector
Experimental Realisation of a \pi/2 Vortex Mode Converter for Electrons Using a Spherical Aberration Corrector Open
In light optics, beams with orbital angular momentum (OAM) can be produced by employing a properly-tuned two-cylinder-lens arrangement, also called $\pi$/2 mode converter. It is not possible to convey this concept directly to the beam in a…
View article: $π$/2 Mode Converters and Vortex Generators for Electrons
$π$/2 Mode Converters and Vortex Generators for Electrons Open
In optics, mode conversion is an elegant way to switch between Hermite Gaussian and Laguerre Gaussian beam profiles and thereby impart orbital angular momentum onto the beam and to create vortices. In optics such vortex beams can be produc…
View article: $\pi$/2 Mode Converters and Vortex Generators for Electrons.
$\pi$/2 Mode Converters and Vortex Generators for Electrons. Open
In optics, mode conversion is an elegant way to switch between Hermite\nGaussian and Laguerre Gaussian beam profiles and thereby impart orbital angular\nmomentum onto the beam and to create vortices. In optics such vortex beams can\nbe pro…
View article: Synthesis and Properties of Monolayer-Protected Co<sub><i>x</i></sub>(SC<sub>2</sub>H<sub>4</sub>Ph)<sub><i>m</i></sub> Nanoclusters
Synthesis and Properties of Monolayer-Protected Co<sub><i>x</i></sub>(SC<sub>2</sub>H<sub>4</sub>Ph)<sub><i>m</i></sub> Nanoclusters Open
Nanometer-sized and stable thiolate-protected cobalt clusters were synthesized by a wet chemical method, leading to a pink solution with well-defined optical activity (ultraviolet-visible) and photoluminescence. The cobalt cluster core of …
View article: Ten years of <scp>EMCD</scp> : what has been achieved
Ten years of <span>EMCD</span> : what has been achieved Open
Energy loss magnetic chiral dichroism (EMCD), established in 2006 [1] celebrates its 10 th anniversary. EMCD is the TEM equivalent of the X‐ray magnetic circular dichroism (XMCD) technique routinely applied on synchrotron beam lines for th…
View article: Spin polarisation with electron Bessel beams?
Spin polarisation with electron Bessel beams? Open
Despite the statement of Bohr and Pauli that Stern‐Gerlach based spin separation for electrons cannot work [1], it has been argued that spin separation or filtering of electrons is possible in particular geometries [2,3]. The argument has …
View article: Towards <scp>EMCD</scp> with an electron vortex filter
Towards <span>EMCD</span> with an electron vortex filter Open
The electrons' wavefront can be arbitrarily shaped by placing holographic masks (HMs) in the condenser system of a TEM. Using HMs with dislocation gratings, it is possible to impart quantized orbital angular momentum (OAM), as well as quan…
View article: Spin‐multislice simulation of an electron inside the objective lens of a TEM
Spin‐multislice simulation of an electron inside the objective lens of a TEM Open
Spin filtering of an unpolarized beam in a TEM is a fascinating field of research. Bohr conjectured that it is impossible to spin filter an electron beam or, using Bohr words, “to observe the spin of the electron, separated fully from its …
View article: High-Temperature Carbon Deposition on Oxide Surfaces by CO Disproportionation
High-Temperature Carbon Deposition on Oxide Surfaces by CO Disproportionation Open
Carbon deposition due to the inverse Boudouard reaction (2CO → CO2 + C) has been studied on yttria-stabilized zirconia (YSZ), Y2O3, and ZrO2 in comparison to CH4 by a variety of different chemical, structural, and spectroscopic characteriz…