Joris J. Carmiggelt
A5081255156- Magnetic properties of thin films
- Diamond and Carbon-based Materials Research
- Quantum and electron transport phenomena
- Magneto-Optical Properties and Applications
- Atomic and Subatomic Physics Research
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Neural Networks and Reservoir Computing
- Chalcogenide Semiconductor Thin Films
- Physics of Superconductivity and Magnetism
- Magnetic Field Sensors Techniques
- Photonic and Optical Devices
- Molecular Junctions and Nanostructures
- Force Microscopy Techniques and Applications
- Semiconductor Quantum Structures and Devices
- Mechanical and Optical Resonators
- Advanced biosensing and bioanalysis techniques
- Perovskite Materials and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Quantum optics and atomic interactions
Delft University of Technology
2020-2023
Harvard University
2021
Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in GHz-to-THz frequency range, utilization nonlinear nonreciprocal phenomena, compatibility with CMOS are just a few many advantages offered by magnons. Although magnonics is still primarily positioned academic domain, scientific technological challenges field being extensively investigated, proof-of-concept prototypes have already been realized...
Spin waves - the elementary excitations of magnetic materials are prime candidate signal carriers for low dissipation information processing. Being able to image coherent spin-wave transport is crucial developing interference-based devices. We introduce a platform probing spin based on resonance imaging with electron spins in diamond. Focusing thin-film insulator, we quantify amplitudes, visualize dispersion, and demonstrate time-domain measurements packets. use our study interference,...
Quantum sensing has developed into a main branch of quantum science and technology. It aims at measuring physical quantities with high resolution, sensitivity, dynamic range. Electron spins in diamond are powerful magnetic field sensors, but their sensitivity the microwave regime is limited to narrow band around resonance frequency. Here, we realize broadband detection using interfaced thin-film magnet. A pump locally converts target signals sensor-spin frequency via non-linear spin-wave...
Scattering experiments have revolutionized our understanding of nature. Examples include the discovery nucleus, crystallography, and double helix structure DNA. techniques differ by type particles used, interaction these with target materials range wavelengths used. Here, we demonstrate a new 2-dimensional table-top scattering platform for exploring magnetic properties on mesoscopic length scales. Long lived, coherent magnonic excitations are generated in thin film YIG scattered off...
Transition metal dichalcogenide (TMD) monolayers are two-dimensional semiconductors with two valleys in their band structure that can be selectively addressed using circularly polarized light. Their photoluminescence spectrum is characterized by neutral and charged excitons (trions) form a chemical equilibrium governed the net charge density. Here, we use doping to drive conversion of into trions [Formula: see text] at room temperature, study resulting valley polarization via measurements...
Nitrogen-vacancy (NV) magnetometry is a new technique for imaging spin waves in magnetic materials. It detects by their microwave stray fields, which decay evanescently on the scale of spin-wavelength. Here, we use nanoscale control single-NV sensor as wavelength filter to characterize frequency-degenerate excited microstrip thin-film insulator. With NV probe contact with magnet, observe an incoherent mixture thermal and microwave-driven waves. By retracting tip, progressively suppress...
Controlling magnon densities in magnetic materials enables driving spin transport magnonic devices. We demonstrate the creation of large, out-of-equilibrium a thin-film insulator via microwave excitation coherent waves and subsequent multimagnon scattering. image both resulting incoherent gas using scanning-probe magnetometry based on electron spins diamond. find that extends unidirectionally over hundreds micrometers from stripline. Surprisingly, density far exceeds expected for boson...
Magnonics is a field of science that addresses the physical properties spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operations in GHz-to-THz frequency range, utilization nonlinear nonreciprocal phenomena, compatibility with CMOS are just few many advantages offered by magnons. Although magnonics still primarily positioned academic domain, scientific technological challenges being extensively investigated, proof-of-concept prototypes have already...
Yttrium iron garnet (YIG) is a magnetic insulator with record-low damping, allowing spin-wave transport over macroscopic distances. Doping YIG gallium ions greatly reduces the demagnetizing field and introduces perpendicular anisotropy, which leads to an isotropic dispersion that facilitates optics steering. Here, we characterize of gallium-doped (Ga:YIG) thin film using electrical spectroscopy. We determine anisotropy parameters Gilbert damping from frequency linewidth ferromagnetic...