Exploring Resonance Across Disciplines at the OIST-Keio Showcase Talk Series Vol. 11

Researchers from the Okinawa Institute of Science and Technology (OIST) and Keio University gathered on May 11, 2026, for the OIST–Keio Showcase Talk Series Vol. 11: Resonance Matters – Micro Optical Resonators for Quantum, Bio, and Energy Applications. The one day partnership event brought together scientists working at the intersection of photonics, quantum technologies, and energy related applications. This event was held as part of the J-PEAKS program.

Opening remarks by Professor Síle Nic Chormaic set the stage for the event program. The morning session featured alternating talks from Keio University and OIST, highlighting complementary perspectives on resonator design, fabrication, and application. Professor Takasumi Tanabe (Keio) opened the scientific program by discussing microresonator based frequency combs and their potential for terahertz transmittance measurement and signal processing.

Professor Takasumi Tanabe (Keio University) delivers a talk during the symposium, presenting research to attendees gathered in the seminar room.

© Keio University / Takeshi Nakaji

Following this, Dr. Christophe Pin (OIST) examined methods for shaping whispering gallery modes through spatial filtering and asymmetric deformation, illustrating how careful control of geometry can tailor optical properties. Professor Yasutomo Ota (Keio) then introduced hybrid integrated quantum photonics enabled by transfer printing, a flexible fabrication technique that allows different photonic components to be combined on a single platform. The morning session concluded with Mohammed Zia Jalaludeen (OIST), who presented work on cavity quantum electrodynamics using thin walled WGM microresonators coupled to nitrogen vacancy centers in diamond, highlighting avenues for strong light–matter coupling in quantum systems.

Posters sparked conversation around experimental techniques, device integration, and emerging applications of resonant photonics. The setting encouraged students, postdoctoral researchers, and faculty to engage directly, ask questions, and identify shared research interests. The afternoon program continued with talks emphasizing quantum interfaces and materials. Hiroki Takahashi (OIST) presented efforts to integrate optical micro cavities within monolithic linear ion traps, aiming to create scalable quantum photonic interconnects. Shun Fujii (Keio) followed with work on imaging dynamic strain induced phenomena in two dimensional materials, demonstrating how optical techniques can reveal subtle physical effects with potential implications for future devices.

Attendees discuss research findings during the poster session at Lab 5.

© Keio University / Takeshi Nakaji

Later in the day, participants moved from the seminar room to the laboratory for guided lab visits. These tours offered a behind the scenes look at facilities and fabrication environments, helping connect the concepts discussed in talks with the practical work carried out at OIST. Seeing devices, setups, and measurement systems firsthand deepened understanding and sparked further discussion.

As the eleventh chapter in the OIST–Keio Showcase Talk Series, this event highlighted how a focused theme can accommodate broad perspectives. By bringing together expertise in resonant photonics, quantum science, and energy related applications, the showcase demonstrated the power of resonance—not only in optical systems, but also in collaborative research across institutions.