Company Filing History:
Years Active: 2000-2002
Title: The Innovative Contributions of Holly A. Marsh in Photonics
Introduction
Holly A. Marsh is a prominent inventor based in St. Louis Park, Minnesota, known for her significant contributions to the field of photonics. With two patents to her name, Holly has pioneered advancements that enhance the efficiency of light detection and its applications in various technologies. Her work primarily focuses on the development of high-performance photodiodes and phototransistors, making her a key figure in the realm of optical innovations.
Latest Patents
Holly A. Marsh's latest inventions include two groundbreaking patents in the field of photonics. The first patent is for a "Back-Illuminated Heterojunction Photodiode." This innovative device features a p-i-n photodiode that achieves high responsivity and quantum efficiency thanks to an AlGaN heterojunction. The design allows for efficient photon absorption within the p-n junction, thereby minimizing carrier losses associated with surface recombination and diffusion processes. Ultraviolet light passes through a transparent substrate, including sapphire and an n-doped AlGaN layer, to reach the undoped AlGaN layer where it is absorbed. The characteristics of the Al and Ga mole fractions in the layers can be adjusted to achieve a specific wavelength bandpass of light detection.
Her second patent is a "High Gain GaN/AlGaN Heterojunction Phototransistor," which features a sophisticated design that includes an AlGaN contact, an i-GaN absorbing layer, a p-GaN base, and n-GaN emitter layers, all formed sequentially on a UV-transparent substrate. This phototransistor boasts an impressive gain exceeding 100,000 and shows remarkable responsivity stability across a spectrum from 360 nm to 400 nm. It also demonstrates rapid electrical quenching of persistent photoconductivity and high dark impedance, with no DC drift, allowing for adjustable detection speeds tailored for specific applications. The performance of this phototransistor represents a substantial improvement over traditional GaN-based photoconductors.
Career Highlights
Holly A. Marsh works at Honeywell International Inc., where she has made significant strides in photonic technologies. Her commitment to innovation is demonstrated through her research and development efforts aimed at enhancing light detection methodologies in electronic devices. Her patents reflect her skilled application of engineering principles and creativity, placing her at the forefront of technological advancements in her field.
Collaborations
Throughout her career, Holly has collaborated with talented colleagues including Wei Yang and Thomas E. Nohava. Together, they have worked on projects that push the boundaries of current technologies, contributing to an environment of teamwork and shared knowledge at Honeywell. Their combined expertise helps to foster innovative solutions that meet the evolving needs of the industry.
Conclusion
Holly A. Marsh stands out as an accomplished inventor whose contributions in photonics are paving the way for future advancements. With her innovative spirit and dedication to her craft, she is likely to continue making significant impacts in the field. Her patents not only enhance the understanding of light detection technologies but also inspire future innovations that may redefine the industry landscape.