Explanipedia

Attosecond microscopy —Advances and outlook Open

Jan Vogelsang, Anders Mikkelsen, Claus Ropers, John H. Gaida, Manish Garg , et al. · 2025

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…

Compact laser system delivering 2-μm few-cycle pulses for strong-field experiments at 200 kHz repetition rate Open

Katrin Meier, Arvid Klösgen, Leif Hansen, Kerstin Harland, Jan Vogelsang · 2024

Laser pulses in the near-infrared spectral range with a high repetition rate and high pulse energy offer the possibility to perform strong-field experiments such as high-order harmonic generation in gases or strong-field photoemission from…

Non-collinear bipulse reconstruction via dispersion scan Open

Julia Altenburg, Carolin P. Bauer, Katrin Meier, Jan Vogelsang · 2024

Light pulses in the femtosecond range require sophisticated methods for their precise temporal characterization. Several techniques have been developed over the past decades that deliver the temporal structure of ultrashort light pulses. S…

Time‐Resolved Photoemission Electron Microscopy on a ZnO Surface Using an Extreme Ultraviolet Attosecond Pulse Pair (Adv. Phys. Res. 3/2024) Open

Jan Vogelsang, Lukas Wittenbecher, Sara Mikaelsson, Chen Guo, Ivan Sytcevich , et al. · 2024

Time‐Resolved Photoemission Electron Microscopy on a ZnO Surface Using an Extreme Ultraviolet Attosecond Pulse Pair Open

Jan Vogelsang, Lukas Wittenbecher, Sara Mikaelsson, Chen Guo, Ivan Sytcevich , et al. · 2023

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…

Time-resolved photoemission electron microscopy on a ZnO surface using an extreme ultraviolet attosecond pulse pair Open

Jan Vogelsang, Lukas Wittenbecher, Sara Mikaelsson, Chen Guo, Ivan Sytcevich , et al. · 2023

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…

CCDC 2195804: Experimental Crystal Structure Determination Open

Robin Ammenhäuser, Patrick Klein, Eva Schmid, Sabrina Streicher, Jan Vogelsang , et al. · 2023

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

Circularly Polarized Light Probes Excited‐State Delocalization in Rectangular Ladder‐type Pentaphenyl Helices Open

Robin Ammenhäuser, Patrick Klein, Eva Schmid, Sabrina Streicher, Jan Vogelsang , et al. · 2022

Ladder‐type pentaphenyl chromophores have a rigid, planar π‐system and show bright fluorescence featuring pronounced vibrational structure. Such moieties are ideal for studying interchromophoric interactions and delocalization of electroni…

Tracking Exciton Diffusion and Exciton Annihilation in Single Nanoparticles of Conjugated Polymers by Photon Correlation Spectroscopy Open

Jakob Schedlbauer, Sabrina Streicher, Michael Förster, Ullrich Scherf, Jan Vogelsang , et al. · 2022

A fundamental question relating to the nature of light emission and absorption in organic semiconductors is the dimension of the domain within a bulk material responsible for the interaction of light and matter. How large can a nanoparticl…

Few-cycle short-wave-infrared light source for strong-field experiments at 200 kHz repetition rate Open

Ivan Sytcevich, Anne‐Lise Viotti, Chen Guo, Jan Vogelsang, Fabian Langer , et al. · 2022

We present a compact, few-cycle, short-wave infrared light source delivering 13 µJ, carrier-envelope phase (CEP) stable pulses around 2 µm, operating at 200 kHz repetition rate. Starting from an ytterbium fiber amplifier, the seed is produ…

Nanoscale π-conjugated ladders Open

Stefanie A. Meißner, Theresa Eder, Tristan J. Keller, David Ari Hofmeister, Sebastian Spicher , et al. · 2021

Coherent Excitation and Control of Plasmons on Gold Using Two-Dimensional Transition Metal Dichalcogenides Open

Jan Vogelsang, Lukas Wittenbecher, Deng Pan, Jiawei Sun, Sara Mikaelsson , et al. · 2021

The hybrid combination of two-dimensional (2D) transition metal dichalcogenides (TMDs) and plasmonic materials open up novel means of (ultrafast) optoelectronic applications and manipulation of nanoscale light-matter interaction. However, …

Characterizing ultrashort laser pulses with second harmonic dispersion scans Open

Ivan Sytcevich, Chen Guo, Sara Mikaelsson, Jan Vogelsang, Anne‐Lise Viotti , et al. · 2021

The dispersion scan (d-scan) technique has emerged as a simple-to-implement characterization method for ultrashort laser pulses. D-scan traces are intuitive to interpret and retrieval algorithms that are both fast and robust have been deve…

Publisher Correction: Measuring the α-particle charge radius with muonic helium-4 ions Open

Julian J. Krauth, Karsten Schuhmann, Marwan Abdou Ahmed, F. D. Amaro, Pedro Amaro , et al. · 2021

Measuring the α-particle charge radius with muonic helium-4 ions Open

Julian J. Krauth, Karsten Schuhmann, Marwan Abdou Ahmed, F. D. Amaro, Pedro Amaro , et al. · 2021

Linearly Polarized Electroluminescence from MoS<sub>2</sub> Monolayers Deposited on Metal Nanoparticles: Toward Tunable Room‐Temperature Single‐Photon Sources Open

Robin P. Puchert, Felix J. Hofmann, Hermann S. Angerer, Jan Vogelsang, Sebastian Bange , et al. · 2021

Break junctions in noble‐metal films can exhibit electroluminescence (EL) through inelastic electron tunneling. The EL spectrum can be tuned by depositing a single‐layer crystal of a transition‐metal dichalcogenide (TMDC) on top. Whereas t…

Unraveling the Ultrafast Hot Electron Dynamics in Semiconductor Nanowires Open

Lukas Wittenbecher, Emil Viñas Boström, Jan Vogelsang, Sebastian Lehman, Kimberly A. Dick , et al. · 2021

Hot electron relaxation and transport in nanostructures involve a multitude of ultrafast processes whose interplay and relative importance are still not fully understood, but which are relevant for future applications in areas such as phot…

Picosecond time-resolved antibunching measures nanoscale exciton motion, annihilation, and true number of chromophores Open

Jacki Gordon, Schröder Tim, Steiner Florian, Eder Theresa, Hofmann Felix , et al. · 2020

The particle-like nature of light becomes evident in the photon statistics of fluorescence of single quantum systems as photon antibunching. In multichromophoric systems, exciton diffusion and subsequent annihilation occur. These processes…

Picosecond time-resolved antibunching measures nanoscale exciton motion, annihilation, and true number of chromophores Open

Jacki Gordon, Schröder Tim, Steiner Florian, Eder Theresa, Hofmann Felix , et al. · 2020

The particle-like nature of light becomes evident in the photon statistics of fluorescence of single quantum systems as photon antibunching. In multichromophoric systems, exciton diffusion and subsequent annihilation occur. These processes…

A high-repetition rate attosecond light source for time-resolved coincidence spectroscopy Open

Sara Mikaelsson, Jan Vogelsang, Chen Guo, Ivan Sytcevich, Anne‐Lise Viotti , et al. · 2020

Attosecond pulses, produced through high-order harmonic generation in gases, have been successfully used for observing ultrafast, subfemtosecond electron dynamics in atoms, molecules and solid state systems. Today’s typical attosecond sour…

Strong-field nano-optics Open

Péter Dombi, Zsuzsanna Pápa, Jan Vogelsang, Sergey V. Yalunin, Murat Sivis , et al. · 2020

Funder: \n National Research, Development and Innovation Office of Hungary\n http://dx.doi.org/10.13039/501100011019

Controlling photoionization using attosecond time-slit interferences Open

Yu-Chen Cheng, Sara Mikaelsson, Saikat Nandi, Lisa Rämisch, Chen Guo , et al. · 2020

When small quantum systems, atoms or molecules, absorb a high-energy photon, electrons are emitted with a well-defined energy and a highly symmetric angular distribution, ruled by energy quantization and parity conservation. These rules ar…

Control of Intrachain Morphology in the Formation of Polyfluorene Aggregates on the Single‐Molecule Level Open

Philipp Wilhelm, Dominik Blank, John M. Lupton, Jan Vogelsang · 2020

Controlling the morphology of π‐conjugated polymers for organic optoelectronic devices has long been a goal in the field of materials science. Since the morphology of a polymer chain is closely intertwined with its photophysical properties…

Nonlinear plasmon-exciton coupling enhances sum-frequency generation from a hybrid metal/semiconductor nanostructure Open

Jin‐Hui Zhong, Jan Vogelsang, Jue-Min Yi, Dong Wang, Lukas Wittenbecher , et al. · 2020

Few-cycle lightwave-driven currents in a semiconductor at high repetition rate Open

Fabian Langer, Yen‐Po Liu, Zhe Ren, Vidar Flodgren, Chen Guo , et al. · 2020

When an intense, few-cycle light pulse impinges on a dielectric or semiconductor material, the electric field will interact nonlinearly with the solid, driving a coherent current. An asymmetry of the ultrashort, carrier-envelope-phase-stab…

Few-cycle lightwave-driven currents in a semiconductor at high\n repetition rate Open

Fabian Langer, Yen‐Po Liu, Zhe Ren, Vidar Flodgren, Guo Chen , et al. · 2020

When an intense, few-cycle light pulse impinges on a dielectric or\nsemiconductor material, the electric field will interact nonlinearly with the\nsolid, driving a coherent current. An asymmetry of the ultrashort,\ncarrier-envelope-phase-s…

Can we break the symmetry along the polarization axis in photoionization? Open

Y-C Cheng, Sara Mikaelsson, Saikat Nandi, Lisa Rämisch, Chen Guo , et al. · 2020

Synopsis Photoionization is a fundamental process in which an electron is emitted from an atom. The emission is traditionally considered to be symmetric with respect to the polarization axis, unless it is temporally confined to a period sh…

Supplementary document for Few-cycle lightwave-driven currents in a semiconductor at high repetition rate - 4473633.pdf Open

Fabian Langer, Yen‐Po Liu, Zhe Ren, Vidar Flodgren, Guo Chen , et al. · 2020

Suplementary information

Interchromophoric Interactions Determine the Maximum Brightness Density in DNA Origami Structures Open

Tim Schröder, Max B. Scheible, Florian Steiner, Jan Vogelsang, Philip Tinnefeld · 2019

An ideal point light source is as small and as bright as possible. For fluorescent point light sources, homogeneity of the light sources is important as well as that the fluorescent units inside the light source maintain their photophysica…

Interplay Between J‐ and H‐Type Coupling in Aggregates of π‐Conjugated Polymers: A Single‐Molecule Perspective Open

Theresa Eder, Jan Vogelsang, Sebastian Bange, Klaas Remmerssen, Daniela Schmitz , et al. · 2019

Strong dipole–dipole coupling within and between π‐conjugated segments shifts electronic transitions, and modifies vibronic coupling and excited‐state lifetimes. Since J‐type coupling between monomers along the conjugated‐polymer (CP) chai…

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