Xavier Marcadet

Title: The Innovative Contributions of Xavier Marcadet

Introduction

Xavier Marcadet is a notable inventor based in Neuilly sur Seine, France. He has made significant contributions to the field of semiconductor technology, holding two patents that showcase his expertise and innovative spirit. His work primarily focuses on infrared detection and photoacoustic detection devices.

Latest Patents

One of Marcadet's latest patents is an infrared detector with extended spectral response in the visible field. This semiconductor-based SWIR infrared detector is sensitive to wavelengths shorter than about 2.5 microns. It comprises a stack of semiconductor layers based on III-V materials forming a PIN photodiode. The stack includes a naked electrical contact, known as a lower electrical contact, which serves as an optical window. Additionally, the detection layer is sensitive to the specified wavelengths. The lower contact consists of at least one layer of indirect-bandgap III-V material(s) doped n-type, which is pseudomorphic or lattice matched with a substrate intended to serve as a temporary substrate, possibly made of a III-V material such as InP or GaAs, or of silicon or germanium.

Another significant patent by Marcadet is a photoacoustic gas detector. This device includes a nanophotonic circuit featuring a plurality of semiconductor lasers capable of emitting different frequencies. It also comprises input couplers connected to optical waveguides, a multiplexer, and an output optical waveguide that emerges into a recess. A tuning fork is arranged at the output of the optical waveguide, along with means for detecting the vibration of the tuning fork. All these elements are assembled into a monolithic component, showcasing Marcadet's innovative approach to detection technology.

Career Highlights

Throughout his career, Xavier Marcadet has worked with prominent companies such as Thales and the Commissariat à l'Énergie Atomique et aux Énergies Alternatives. His experience in these organizations has allowed him to develop and refine his skills in semiconductor technology and innovation.

Collaborations

Marcadet has collaborated with notable colleagues, including Sergio Nicoletti and Philippe Andreucci. These partnerships have contributed to his success and the advancement of his inventions.

Conclusion

Xavier Marcadet's contributions to the field of semiconductor technology through his patents and collaborations highlight his innovative spirit and expertise. His work continues to influence advancements in infrared and photoacoustic detection technologies.