Zeyu Zhang

Title: Zeyu Zhang: Innovator in Photonics

Introduction

Zeyu Zhang is a prominent inventor based in Goleta, California, known for his contributions to the field of photonics. With a total of two patents to his name, Zhang has made significant strides in the development of advanced optical devices.

Latest Patents

Zhang's latest patents include innovations in mode control within heterogeneously integrated photonics. The first patent describes a device that features first, second, and third elements fabricated on a common substrate. The first element supports a first optical mode in an active waveguide structure characterized by a mesa. The second element supports a second optical mode in a passive waveguide structure. The third element, which is at least partly butt-coupled to the first element, supports an intermediate optical mode in an intermediate waveguide structure characterized by a waveguide core cross-section that includes a shallow step. A tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the second optical mode and the intermediate optical mode. Notably, no adiabatic transformation occurs between the intermediate optical mode and the first optical mode. Lithographic alignment marks are utilized to ensure precise alignment of the three elements during device fabrication.

The second patent focuses on a heterogeneously integrated short wavelength photonic platform designed to minimize reflections. This device also comprises first, second, and third elements fabricated on a common substrate. The first element supports a first optical mode in a first active waveguide, while the second element supports a second optical mode in a second passive waveguide. The third element, which is at least partly butt-coupled to the first element, features a bottom waveguide that supports a bottom intermediate mode, overlying a top waveguide that supports a top intermediate mode. A tapered waveguide structure in the top waveguide facilitates efficient adiabatic transformation between the top intermediate mode and the bottom intermediate mode. Tapering in at least one of the bottom waveguide and the second waveguide enhances the efficient adiabatic transformation between the second optical mode and the bottom intermediate optical mode. Similar to the first patent, no adiabatic transformation occurs between either of the intermediate optical modes and the first optical mode, with lithographic alignment marks aiding in precise alignment during fabrication.

Career Highlights

Zeyu Zhang is currently employed at Nexus Photonics LLC, where he continues to