2 papers
physics.optics2024
Scalable fabrication of erbium-doped high-Q silica microtoroid resonators via sol-gel coating
Riku Imamura, Shun Fujii, Keigo Nagashima +1
This study explores sol-gel methods for fabricating erbium-doped silica microtoroid resonators, addressing the limitations of conventional doping techniques and enhancing device sc…
physics.optics2023
Exceptional point proximity-driven mode-locking in coupled microresonators
Riku Imamura, Shun Fujii, Ayata Nakashima +1
We show theoretically and numerically that mode-locking is feasible with a coupled-cavity system with gain and loss, notably, without any natural saturable absorber. We highlight t…