A5083329638- Electron and X-Ray Spectroscopy Techniques
- Metamaterials and Metasurfaces Applications
- Plasmonic and Surface Plasmon Research
- Acoustic Wave Phenomena Research
- Advanced Electron Microscopy Techniques and Applications
- Orbital Angular Momentum in Optics
- Electron Spin Resonance Studies
- Near-Field Optical Microscopy
- Quantum Dots Synthesis And Properties
- Advanced Surface Polishing Techniques
- Advanced Materials and Mechanics
- Nanowire Synthesis and Applications
- Electrochemical Analysis and Applications
- Geotechnical Engineering and Underground Structures
- X-ray Spectroscopy and Fluorescence Analysis
- Advancements in Battery Materials
- Thermal properties of materials
- Ion-surface interactions and analysis
- Force Microscopy Techniques and Applications
- Lanthanide and Transition Metal Complexes
- Vibration and Dynamic Analysis
- Electrohydrodynamics and Fluid Dynamics
- Semiconductor materials and devices
- Copper-based nanomaterials and applications
- nanoparticles nucleation surface interactions
Ferdinand-Braun-Institut
2022-2024
Kirchhoff (Germany)
2024
Swiss Federal Laboratories for Materials Science and Technology
2023
Abstract Plasmonic double helical antennas are a means to funnel circularly polarized light down the nanoscale. Here, an existing design tool for single helices is extended case of and used that combine large chiroptical interaction strength with highly directional emission. Full‐field numerical modeling underpins provides additional insight into surface charge distributions resonance widths. The fabricated by direct writing focused electron beam, technique unrivaled in terms spatial...
Abstract Chemical vapor deposition (CVD) is an established method for producing high‐purity thin films, but it typically necessitates the pre‐ and post‐processing using a mask to produce structures. This study presents novel maskless patterning technique that enables area‐selective CVD of gold. A focused electron beam used decompose metal–organic precursor Au(acac)Me 2 locally, thereby creating autocatalytically active seed layer subsequent with same precursor. The procedure can be included...
Abstract Electron paramagnetic resonance (EPR) is the gold standard for studying species. As an example, in structural biology, it allows to extract information about distance distributions on nanometer scale via site-directed spin labeling. Conventional pulsed EPR of biological samples currently limited relatively large sample concentrations and cryogenic temperatures, mainly due low sensitivity significant dead time associated with conventional resonator-based setups, essentially...
Plasmonic antennas with helical geometry can convert linearly polarized dipole radiation into purely circularly far-fields, and vice versa. Besides large Purcell enhancements, they possess a wide tunability due to the dependence of their resonant modes. Here, coupling emitter embedded in thin film plasmonic single double helices is numerically studied. Using higher-order finite element method (FEM), wavelength dependent enhancement different positions orientations calculated far-fields...
Plasmonic antennas with helical geometry are capable transducers between linearly polarized dipole emission and purely circular far-fields. Besides large Purcell enhancements they possess a wide tunability due to the dependence of their resonant modes. Here, coupling emitter embedded in thin film plasmonic single double helices is numerically studied. Using higher-order finite element method (FEM) wavelength dependent enhancement different positions orientations calculated far-fields respect...
Direct electron beam writing is a powerful tool for fabricating complex nanostructures in single step. The locally cleaves the molecules of an adsorbed gaseous precursor to form deposit, similar 3D printing but without need resist or development Here, we employ first time silver β-diketonate focused beam-induced deposition (FEBID). used compound (hfac)AgPMe 3 operates at evaporation temperature 70–80 °C and compatible with commercially available gas injection systems any standard scanning...
Abstract This study discusses the importance of accurately calculating optical response Bragg gratings and challenges associated with 3D finite-difference time-domain (FDTD) method for simulating large-scale structures. The grating section in monolithic extended cavity diode lasers is substantial size, making FDTD simulations computationally challenging due to their complexity. In order assess accuracy simulations, we compare them experimental results. Using a precise model design, involving...
Direct electron beam writing is a powerful tool for fabricating complex nanostructures in single step. The locally cleaves the molecules of an adsorbed gaseous precursor to form deposit, similar 3D printing but without need resist or development Here, we employ first time silver $\beta$-diketonate focused induced deposition (FEBID). used compound (hfac)AgPMe$_3$ operates at evaporation temperature 70 - 80{\deg}C and compatible with commercially available gas injection systems any standard...
Near-field optical microscopy and spectroscopy provide high-resolution imaging below the diffraction limit, crucial in physics, chemistry, biology for studying molecules, nanoparticles, viruses. These techniques use a sharp metallic tip of an atomic force microscope (AFM) to enhance incoming scattered light by excited near-fields at apex, leading high sensitivity spatial resolution few nanometers. However, this restricts near-field orientation out-of-plane polarization, limiting polarization...
Plasmonic double helical antennas are a means to funnel circularly polarized states of light down the nanoscale. Here, an existing design tool for single helices is extended case and used that combine large chiroptical interaction strength with highly directional emission. Full-field numerical modeling underpins provides additional insight into surface charge distributions resonance widths. The experimentally realized were studied regarding their polarization-dependent transmission behavior...
Near-field optical microscopy and spectroscopy provide high-resolution imaging below the diffraction limit, crucial in physics, chemistry, biology for studying molecules, nanoparticles, viruses. These techniques use a sharp metallic tip of an atomic force microscope (AFM) to enhance incoming scattered light by excited near-fields at apex leading high sensitivity spatial resolution few nanometers. However, this restricts near-field orientation out-of-plane polarization, limiting polarization...
Phononic crystals (PnCs) are artificially patterned media exhibiting bands of allowed and forbidden zones for phonons. Many emerging applications PnCs from solid-state simulators to quantum memories could benefit the on-demand tunability phononic band structure. Here, we demonstrate fabrication suspended graphene in which structure is controlled by mechanical tension applied electrostatically. We show signatures a mechanically tunable gap. The experimental data supported simulation suggest...
Abstract Phononic crystals (PnCs) are artificially patterned media exhibiting bands of allowed and forbidden zones for phonons—in analogy to the electronic band structure crystalline solids arising from periodic arrangement atoms. Many emerging applications PnCs solid-state simulators quantum memories could benefit on-demand tunability phononic structure. Here, we demonstrate fabrication suspended graphene in which is controlled by mechanical tension applied electrostatically. We show...
Chemical vapour deposition (CVD) is an established method for producing high-purity thin films, but it typically necessitates the pre- and post-processing of a mask to produce structures. This paper presents novel maskless patterning technique that enables area selective CVD gold. A focused electron beam used decompose metal-organic precursor Au(acac)Me$_2$ locally, thereby creating autocatalytically active seed layer subsequent with same precursor. The procedure can be included in cycle...