Pioneering the development of spin-wave optical devices through focused-ion-beam writing techniques, demonstrating that classical optical concepts can be successfully translated to magnonic systems at the nanoscale.
My research in spin-wave optics focuses on manipulating spin waves—collective excitations of magnetic moments—using techniques borrowed from classical optics. By employing focused-ion-beam (FIB) irradiation, we can locally modify the magnetic properties of yttrium iron garnet (YIG) thin films without removing material, creating magnonic analogs of optical devices.
This approach has led to several breakthrough demonstrations, including the first experimental realization of a spin-wave lens designed using machine learning algorithms, and the development of Rowland-type spectrometers for spin waves.
The ability to control spin waves at submicron scales opens new possibilities for information processing, offering advantages such as low power consumption, non-volatile operation, and compatibility with existing CMOS technology.
First experimental demonstration of a spin-wave lens optimized using inverse design algorithms, achieving focusing efficiency beyond conventional approaches.
Achieved unprecedented control over spin-wave propagation at wavelengths below 1 μm using FIB-induced modifications in YIG films.
Developed concave gratings for spin waves, demonstrating Rowland spectrometer functionality in magnonic systems.
Implemented Fourier-domain processors for spin waves, enabling complex signal processing operations in the magnonic domain.
Using Ga+ ions at 30 keV energy, we locally modify the saturation magnetization and exchange stiffness of YIG films. This creates refractive index variations for spin waves without material removal.
Working with 100-200 nm thick YIG films grown by liquid phase epitaxy, providing ultra-low damping for spin-wave propagation over millimeter distances.
Employing Brillouin light scattering for spatially and temporally resolved detection of spin-wave dynamics with sub-micron resolution.
This work demonstrates focused-ion-beam (FIB) writing as a maskless technique for spin-wave optical devices, showing magnonic versions of lenses, gratings, and Fourier-domain processors.
First experimental realization of a spin-wave lens designed using machine learning optimization techniques.
Demonstration of Rowland-type spectrometer functionality for spin waves using FIB-written gratings.
Investigation of Ga+ ion implantation effects on YIG thin films for controlled spin-wave propagation.
Exploring quantum effects in magnonic systems, including entanglement and quantum information processing with magnons.
Developing magnonic neural networks and reservoir computing systems for energy-efficient artificial intelligence.
Extending spin-wave manipulation to three dimensions for increased functionality and integration density.
Integrating magnonic devices with photonic and electronic components for multi-physics information processing.