Dai Ohnishi

Title: **Dai Ohnishi: A Pioneer in Photonic Crystal Laser Technology**

Introduction

Dai Ohnishi, an innovative inventor based in Kyoto, Japan, has made significant contributions to the field of photonic crystal lasers. With a remarkable portfolio comprising 21 patents, Ohnishi's work focuses on advancing laser technologies that have the potential for various applications in optics and telecommunications.

Latest Patents

Ohnishi's latest patents include groundbreaking inventions such as the **Two-dimensional Photonic Crystal Laser**. This invention features a two-dimensional photonic crystal layer composed of a base body made from AlGaAs or (AlGa)InP. The design incorporates modified refractive index areas, or air holes, arranged periodically within the crystal. This structure enables the epitaxial growth layer to maintain the crystal's performance as a resonator, especially at high temperatures.

Another noteworthy invention is the **Two-dimensional Photonic Crystal Surface Emitting Laser Light Source**. This laser source also employs a two-dimensional photonic crystal characterized by a series of identically-shaped holes. The configuration allows for the effective injection of electric charges into the active layer, generating a light which produces a robust electric field effect. This innovative design enhances the strength of the laser light, yielding superior results compared to traditional methods.

Career Highlights

Dai Ohnishi has worked with prestigious organizations including Rohm Co., Ltd. and Kyoto University. His affiliation with these institutions reflects his commitment to advancing research and development in photonic technologies. Throughout his career, Ohnishi has remained at the forefront of innovation, continually seeking to refine his inventions and broaden their applications.

Collaborations

Collaboration is an essential aspect of Ohnishi's success. He has worked alongside talented colleagues such as Susumu Noda and Eiji Miyai. Their combined expertise has fostered a creative environment that drives the development of cutting-edge technologies in the field of photonics.

Conclusion

Dai Ohnishi's contributions to the realm of laser technology exemplify the spirit of innovation. His patents not only showcase his ingenuity but also promise to influence future advancements in optical technologies. With ongoing collaboration and research, Ohnishi continues to pave the way for new developments in photonic crystal lasers, solidifying his place as a leading inventor in the field.