Anders Mikkelsen
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View article: Bi trimers and self-limiting Bi-Sb interface formation upon Bi deposition on InSb(111)B surfaces
Bi trimers and self-limiting Bi-Sb interface formation upon Bi deposition on InSb(111)B surfaces Open
Investigating metal-semiconductor interfaces is crucial for enabling ultra-thin film growth and tuning the electronic properties. Here we have studied the atomic mechanism of Bi incorporation into the surface of InSb, the III-V semiconduct…
View article: Neural network connectivity by optical broadcasting between III-V nanowires
Neural network connectivity by optical broadcasting between III-V nanowires Open
Biological neural network functionality depends on the vast number of connections between nodes, which can be challenging to implement artificially. One radical solution is to replace physical wiring with broadcasting of signals between th…
View article: Flexible fabrication of aligned multi-nanowire circuits for on-chip prototyping
Flexible fabrication of aligned multi-nanowire circuits for on-chip prototyping Open
Circuits of multiple deterministically positioned semiconductor nanowires (NWs) is the basis of many devices for photonic, quantum, or conventional transistor applications. To explore and iterate on the design of larger circuits, the means…
View article: Neuromorphic Readout for Hadron Calorimeters
Neuromorphic Readout for Hadron Calorimeters Open
We simulate hadrons impinging on a homogeneous lead tungstate (PbWO4) calorimeter using GEANT4 software to investigate how the resulting light yield and its temporal structure, as detected by an array of light-sensitive sensors, can be pro…
View article: X-ray analysis of nanowires and nanowire devices: structure, function and synthesis
X-ray analysis of nanowires and nanowire devices: structure, function and synthesis Open
X-ray methods can offer unique insights into the structural and electronic properties of nanomaterials. Recent years have seen a dramatic improvement in both x-ray sources and x-ray optics, providing unprecedented resolution and sensitivit…
View article: Combined Light Excitation and Scanning Gate Microscopy on Heterostructure Nanowire Photovoltaic Devices
Combined Light Excitation and Scanning Gate Microscopy on Heterostructure Nanowire Photovoltaic Devices Open
Nanoscale optoelectronic components achieve functionality via spatial variation in electronic structure induced by composition, defects, and dopants. To dynamically change the local band alignment and influence defect states, a scanning ga…
View article: Neuromorphic Readout for Hadron Calorimeters
Neuromorphic Readout for Hadron Calorimeters Open
We simulate hadrons impinging on a homogeneous lead-tungstate (PbWO4) calorimeter to investigate how the resulting light yield and its temporal structure, as detected by an array of light-sensitive sensors, can be processed by a neuromorph…
View article: Attosecond microscopy —Advances and outlook
Attosecond microscopy —Advances and outlook Open
Attosecond microscopy aims to record electron movement on its natural length and time scale. It is a gateway to understanding the interaction of matter and light, the coupling between excitations in solids, and the resulting energy flow an…
View article: Direct on-Chip Optical Communication between Nano Optoelectronic Devices
Direct on-Chip Optical Communication between Nano Optoelectronic Devices Open
On-chip optical communication between individual nano optoelectronic components is important to reduce the footprint and improve energy efficiency of photonic neuromorphic solutions. Although nanoscale photon emitters and receivers have be…
View article: Integrating molecular photoswitch memory with nanoscale optoelectronics for neuromorphic computing
Integrating molecular photoswitch memory with nanoscale optoelectronics for neuromorphic computing Open
Photonic solutions are potentially highly competitive for energy-efficient neuromorphic computing. However, a combination of specialized nanostructures is needed to implement all neuro-biological functionality. Here, we show that donor-acc…
View article: Ion Migration and Redox Reactions in Axial Heterojunction Perovskite CsPb(Br<sub>1–<i>x</i></sub>Cl<i>x</i>)<sub>3</sub> Nanowire Devices Revealed by Operando Nanofocused X-ray Photoelectron Spectroscopy
Ion Migration and Redox Reactions in Axial Heterojunction Perovskite CsPb(Br<sub>1–<i>x</i></sub>Cl<i>x</i>)<sub>3</sub> Nanowire Devices Revealed by Operando Nanofocused X-ray Photoelectron Spectroscopy Open
Metal-halide perovskites (MHPs) have gained substantial interest in the energy and optoelectronics field. MHPs in nanostructure forms, such as nanocrystals and nanowires (NWs), have further expanded the horizons for perovskite nanodevices …
View article: Sub-100 fs Formation of Dark Excitons in Monolayer WS<sub>2</sub>
Sub-100 fs Formation of Dark Excitons in Monolayer WS<sub>2</sub> Open
Two-dimensional semiconducting transition metal dichalcogenides are promising materials for optoelectronic applications due to their strongly bound excitons. While bright excitons have been thoroughly scrutinized, dark excitons have been m…
View article: A Concept from Sensor to Sustainability in Machining – An Interdisciplinary Approach over a Wide TRL Range
A Concept from Sensor to Sustainability in Machining – An Interdisciplinary Approach over a Wide TRL Range Open
This publication describes a concept that intends to enable an optimization of machining with regard to the balance between criteria related to technology, economy and sustainability. The work is of a discussion nature and intends to provi…
View article: 2D electron gas formation on InAs wurtzite nanosheet surfaces
2D electron gas formation on InAs wurtzite nanosheet surfaces Open
The two-dimensional electron gas (2DEG) that forms on a semiconductor surface can be used to explore a variety of phenomena in quantum physics and plays an important role in nanoscale electronics, such as transistors. Controlling its forma…
View article: Diffusion Bonding 321-Grade Stainless Steel: Failure and Multimodal Characterization
Diffusion Bonding 321-Grade Stainless Steel: Failure and Multimodal Characterization Open
Vacuum diffusion-bonded printed circuit heat exchangers are an attractive choice for the high-temperature, high-pressure demands of next-generation energy applications. However, early reports show that the high-temperature materials desire…
View article: Structural and chemical properties of anion exchanged CsPb(Br <sub>(1−x)</sub> Cl <sub>x</sub> ) <sub>3</sub> heterostructured perovskite nanowires imaged by nanofocused x-rays
Structural and chemical properties of anion exchanged CsPb(Br <sub>(1−x)</sub> Cl <sub>x</sub> ) <sub>3</sub> heterostructured perovskite nanowires imaged by nanofocused x-rays Open
Over the last years metal halide perovskites have demonstrated remarkable potential for integration in light emitting devices. Heterostructures allow for tunable bandgap depending on the local anion composition, crucial for optoelectronic …
View article: Sub-100-fs formation of dark excitons in monolayer WS2
Sub-100-fs formation of dark excitons in monolayer WS2 Open
Two-dimensional semiconducting transition metal dichalcogenides (TMDs) are promising for optoelectronic applications due to their strongly bound excitons. While bright excitons have been thoroughly scrutinized, dark excitons are much less …
View article: In situ imaging of precipitate formation in additively manufactured al-alloys by scanning X-ray fluorescence
In situ imaging of precipitate formation in additively manufactured al-alloys by scanning X-ray fluorescence Open
Al-alloys incorporating Mn, Cr and Zr, tailored for powder bed fusion-laser beam processes with solubilities three times equilibrium have recently been developed that yield a high strength. Mn and Cr-enriched precipitates that form during …
View article: Time‐Resolved Photoemission Electron Microscopy on a ZnO Surface Using an Extreme Ultraviolet Attosecond Pulse Pair (Adv. Phys. Res. 3/2024)
Time‐Resolved Photoemission Electron Microscopy on a ZnO Surface Using an Extreme Ultraviolet Attosecond Pulse Pair (Adv. Phys. Res. 3/2024) Open
View article: Spatially resolved structural and chemical properties of the white layer in machined Inconel 718 super alloy
Spatially resolved structural and chemical properties of the white layer in machined Inconel 718 super alloy Open
Inconel 718 is one type of nickel-based alloy used for a large range of applications, including gas turbines and aeroengines components. Although mechanical and thermodynamic properties of this material have been deeply studied in the past…
View article: Bi Trimers and Self-Limiting Bi-Sb Interface Formation Upon Bi Deposition on Insb(111)B Surfaces
Bi Trimers and Self-Limiting Bi-Sb Interface Formation Upon Bi Deposition on Insb(111)B Surfaces Open
View article: Bismuth-oxide nanoparticles: study in a beam and as deposited
Bismuth-oxide nanoparticles: study in a beam and as deposited Open
Bi 2 O 3 is a promising material for solid-oxide fuel cells due to the high ionic conductivity of some phases. X-ray photoelectron spectroscopy is a powerful method for oxidation state and phase assignment. TEM and diffraction are desired …
View article: Time‐Resolved Photoemission Electron Microscopy on a ZnO Surface Using an Extreme Ultraviolet Attosecond Pulse Pair
Time‐Resolved Photoemission Electron Microscopy on a ZnO Surface Using an Extreme Ultraviolet Attosecond Pulse Pair Open
Electrons photoemitted by extreme ultraviolet attosecond pulses derive spatially from the first few atomic surface layers and energetically from the valence band and highest atomic orbitals. As a result, it is possible to probe the emissio…
View article: In situ Imaging of Precipitate Formation in Additively Manufactured Al-Alloys by Scanning X-ray Fluorescence
In situ Imaging of Precipitate Formation in Additively Manufactured Al-Alloys by Scanning X-ray Fluorescence Open
A new family of high-strength Al-alloys has recently been developed, tailored for the powder bed fusion-laser beam process. In these alloys, Mn, Cr and Zr are incorporated in solid solution at amounts up to three times that of equilibrium …
View article: Time-resolved photoemission electron microscopy on a ZnO surface using an extreme ultraviolet attosecond pulse pair
Time-resolved photoemission electron microscopy on a ZnO surface using an extreme ultraviolet attosecond pulse pair Open
Electrons photoemitted by extreme ultraviolet attosecond pulses derive spatially from the first few atomic surface layers and energetically from the valence band and highest atomic orbitals. As a result, it is possible to probe the emissio…
View article: Artificial nanophotonic neuron with internal memory for biologically inspired and reservoir network computing
Artificial nanophotonic neuron with internal memory for biologically inspired and reservoir network computing Open
Neurons with internal memory have been proposed for biological and bio-inspired neural networks, adding important functionality. We introduce an internal time-limited charge-based memory into a III–V nanowire (NW) based optoelectronic neur…
View article: Geometric control of diffusing elements on InAs semiconductor surfaces via metal contacts
Geometric control of diffusing elements on InAs semiconductor surfaces via metal contacts Open
Local geometric control of basic synthesis parameters, such as elemental composition, is important for bottom-up synthesis and top-down device definition on-chip but remains a significant challenge. Here, we propose to use lithographically…
View article: Artificial Nanophotonic Neuron with Internal Memory for Biologically Inspired and Reservoir Network Computing
Artificial Nanophotonic Neuron with Internal Memory for Biologically Inspired and Reservoir Network Computing Open
Neurons with internal memory have been proposed for biological and bio-inspired neural networks, adding interesting functionality. We propose and model a nanoscale optoelectronic neural node with charge-based time-limited memory and signal…
View article: A 2D Bismuth-Induced Honeycomb Surface Structure on GaAs(111)
A 2D Bismuth-Induced Honeycomb Surface Structure on GaAs(111) Open
Two-dimensional (2D) topological insulators have fascinating physical properties which are promising for applications within spintronics. In order to realize spintronic devices working at room temperature, materials with a large nontrivial…
View article: Geometric control of diffusing elements on InAs semiconductor surfaces via metal contacts
Geometric control of diffusing elements on InAs semiconductor surfaces via metal contacts Open
XPEEM image stacks for the Al2p, In4d and As3d core levels µ-XPS of Pd AFM data SEM data of the metal patterns with droplet free zones after a variety of annealing temperatures