Researchers use spatially shaped light to control the direction of spin-wave emission from the ferrimagnetic insulator Gd4/3Yb2/3BiFe5O12. They capture the essential features of the observations by employing a simple model that maps the spatial profile of the pump pulse onto the dispersion relation of the spin wave.
- Takuya Satoh
- Yuki Terui
- Kazuo Kuroda