Ryoichi Sakata
■ Assistant Professor
@ Institute for Molecular Science, Shinokita-G
■ PhD of Engineering (Kyoto University) (2021/03)
■ Hobbies : Kyo-gi Carta / Traveling / Reading
At Budapest in January, 2026
EDUCATION
RESEARCH INTERESTS
TMDs × Nano Structure: Pioneering the Next-Generation of Chiral-Valley Optoelectronics
Transition Metal Dichalcogenides (TMDs) are fascinating atomically thin semiconductors featuring unique valley and spin degrees of freedom. However, their light-matter interaction is fundamentally limited by their sub-nanometer thickness, and their optical responses are often vulnerable to environmental noise.
To overcome these challenges, my research focuses on a structural approach: rather than relying solely on the intrinsic properties of 2D materials, I aim to engineer macroscopic "optical cages" to perfectly dictate their quantum behavior. By bridging top-down nanophotonics with bottom-up 2D quantum materials, I leverage state-of-the-art cleanroom nanofabrication to strongly confine light and actively manipulate the valley-spin properties of TMDs.
Modulated Photonic Crystal Surface Emitting Lasers (previous research theme)
Functional light sources such as 2D beam scanning lasers, flash-type light sources and multi-dot light sources are indispensable in various fields including sensing, object recognition, and adaptive lighting. Conventional light sources combine lasers with mechanical components or external optics, such as complex lens systems and diffractive optical elements. This combination increases the cost and complexity of the system by requiring fine alignment. To avoid these problems, a semiconductor laser with diffractive functionalities embedded into its internal structure is desired. We have proposed and study the modulated surface-emitting photonic crystal laser (PCSEL) as one such laser which enable arbitary beam pattern emission.
AFFILIATION
2025.10 - Present
Assistant Professor, Institute for Molecular Science,
2018.4 - 2021.3
Kyoto University,
Noda's Quantum Optoelectronics Lab.
Doctor course student / Research fellow DC1
Experimental demonstration of various beam patterns from single-chip M-PCSEL without external optical elements: an illustration of “The Great Wave” by Hokusai Katsushika.
(Materials Molecular Science, Shonokita G)