Abstract
Varying composition, deep-well quantum cascade (QC) laser structures are grown using metal-organic chemical vapor deposition (MOCVD). The compositions of the quantum wells and barriers in the active regions differ from those in the extractor/injector regions. Since the highly strained layers (i.e., In 0.68Ga 0.32As and Al 0.75In 0.25As) are not grown throughout the structure, the net cumulative strain can be lower than that in conventional QC lasers. Those layers’ thicknesses and compositions were calibrated using X-ray diffraction (XRD) spectra of strain-compensated superlattice (SL) structures. The XRD spectra from 30-stage, deep-well QC structures confirm that extremely accurate layer thicknesses and compositions can be achieved via MOCVD. Fabricated ridge-guide devices, lasing at ∼4.8 μm, exhibit ultra-low temperature sensitivity of their electro-optical characteristics by comparison to those of conventional QC lasers emitting in the 4.5–5.5 μm wavelength range.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
