Variable resonator (variable Q) photopumped phonon-assisted quantum well laser operation

Holonyak, N., Nam, D. W., Vesely, E. J., Guido, L. J., Gavrilovic, P., Meehan, K., Stutius, W. and Williams, J. E. (1990) Variable resonator (variable Q) photopumped phonon-assisted quantum well laser operation. Applied Physics Letters, 56(1), 60. (doi: 10.1063/1.102646)

Abstract

Data are presented on a photopumped rectangular (w=40 μm, l=250 μm) quantum wellheterostructure (QWH), with variable resonator Q along the sample, showing that phonon‐assisted laser operation predominates. To achieve variable resonator Q, the QWH sample is heat sunk embedded in In over half of its length (reflecting edges, high Q), as opposed to simple contact with a Au shim over the remaining half and no reflecting metal on the sample edges (low Q). Photopumping at the low Q, high Q boundary near the sample center turns on and off the n=1 confined‐particle recombination transition (E 11 ) and sets a higher energy experimental (as well as calculated) reference, ℏω2 =E 11, for the lower energy phonon‐assisted laser operation, ℏω1 =E 11 −ℏωLO .

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Meehan, Professor Kathleen
• Authors: Holonyak, N., Nam, D. W., Vesely, E. J., Guido, L. J., Gavrilovic, P., Meehan, K., Stutius, W., and Williams, J. E.
• College/School: College of Science and Engineering > School of Engineering
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118