Ryoichi Sakata

Title: Ryoichi Sakata and Two-Dimensional Photonic Crystal Laser

Introduction

Ryoichi Sakata is an inventor associated with Kyoto University in Kyoto, Japan. His recorded patent concerns a two-dimensional photonic crystal laser, an invention designed to control laser-beam characteristics through a patterned photonic crystal structure. Sakata’s listed patent portfolio includes 1 patent.

Latest Patents

Sakata’s patent, “Two-Dimensional Photonic Crystal Laser,” describes a device comprising electrodes, an active layer, and a two-dimensional photonic crystal layer. In that layer, modified refractive-index regions are positioned with varying shifts from lattice points, varying areas at those points, or both.

The patent describes modifying the shifts or areas according to a composite modulation period. Its modulation phase is expressed using the position of each lattice point and vectors representing laser beams with differing inclination angles or azimuthal angles. The amplitudes and phases assigned to at least two beam components differ, enabling the structure to support multiple laser beams with distinct directional characteristics.

Career Highlights

Sakata’s listed work connects him with Kyoto University and research into photonic-crystal laser design. The patent focuses on how variations in lattice placement and region size can shape the behavior of laser beams.

Collaborations

Susumu Noda is identified as Sakata’s coworker. Their association is relevant to the research context surrounding the photonic-crystal laser invention.

Conclusion

Ryoichi Sakata’s recorded invention applies controlled variations in a two-dimensional photonic crystal to a laser structure, highlighting a specialized contribution to photonics research at Kyoto University.