2019/10/17 by JG Coutard, Coutard, JG, M. Brun +17
Chemical Engineering · Chemistry · Engineering · #Analytical Chemistry and Sensors #Applied Physics (physics.app-ph) #FOS: Physical sciences #Photonic and Optical Devices #Spectroscopy and Laser Applications
paper · pdf · doi:10.48550/arxiv.1910.07821
openalex publication_date 2019/10/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The manufacturing cost of quantum cascade lasers is still a major bottleneck for the adoption of this technology for chemical sensing. The integration of Mid-Infrared sources on Si substrate based on CMOS technology paves the way for high-volume low-cost fabrication. Furthermore, the use of Si-based fabrication platform opens the way to the co-integration of QCL Mid-InfraRed sources with SiGe-based waveguides, allowing realization of optical sensors fully integrated on planar substrate. We report here the fabrication and the characterization of DFB-QCL sources using top metal grating approach working at 7.4 microns fully implemented on our 200 mm CMOS pilot line. These QCL featured threshold current density of 2.5 kA/cm2 and a linewidth of 0.16 cm-1 with a high fabrication yield. This approach paves the way toward a Mid-IR spectrometer at the silicon chip level.