Company Filing History:
3 out of 161 
3 out of 164,108 
1 out of 997 
Years Active: 2018-2021
Title: Yaojia Chen: Innovator in Photodetector Technology
Introduction
Yaojia Chen is a prominent inventor based in Jersey City, NJ (US). He holds a total of 7 patents that showcase his contributions to the field of photodetector technology. His innovative approaches have significantly advanced the performance and efficiency of photonic devices.
Latest Patents
One of Yaojia Chen's latest patents focuses on reducing back reflection in a photodiode. The back reflection in photodiodes is caused by an abrupt index contrast between the input waveguide and the composite waveguide/light absorbing material. To improve this back reflection, he proposes introducing an angle between the waveguide and the leading edge of the light absorbing material. This angle results in a gradual change in the effective index between the index of the waveguide and the index of the composite section, consequently lowering the amount of light reflecting back.
Another significant patent is for a metal contact-free photodetector with sidewall doping. This device includes an optically absorbing material, such as germanium, mounted on a device layer of a photonic integrated circuit. The circuit features a p-type contact and an n-type contact on opposite sides of a waveguide. The contacts consist of a plurality of independently doped regions, ranging from the lowest doped adjacent to the waveguide to the highest doped remote from it. An additional element involves adding p and/or n doping on one or more of the sidewalls of the optically absorbing material. This design offers a higher bandwidth compared to previously disclosed metal-contact-free photodetectors, achieving full speed at lower voltage.
Career Highlights
Yaojia Chen has worked with notable companies in the technology sector, including Elenion Technologies, LLC and IBM. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in photonic technologies.
Collaborations
Throughout his career, Yaojia Chen has collaborated with talented individuals such as Ning Li and Devendra K Sadana. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Yaojia Chen's work in photodetector technology exemplifies his commitment to innovation and excellence. His patents reflect a deep understanding of the challenges in the field and offer practical solutions that enhance device performance. His
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