Title :
Absence of filamentation in quantum-dot lasers. Theory and experiment
Author :
Chow, W.W. ; Schneider, H.C. ; Pearce, E.J. ; Smowton, P.M.
Author_Institution :
Semicond. Material & Device Sci. Dept., Sandia Nat. Labs., Albuquerque, NM, USA
Abstract :
We theoretically and experimentally investigate the lateral mode behavior of quantum-dot lasers, and demonstrate the absence of filamentation up to 10× threshold. The negative linewidth enhancement factor necessary for filamentation in highly-excited quantum dot lasers originates from the Coulomb coupling between quantum-dot and quantum-well states.
Keywords :
excited states; laser modes; quantum dot lasers; spectral line breadth; Coulomb coupling; filamentation; highly-excited quantum dot lasers; lateral mode behavior; negative linewidth enhancement factor; quantum-dot lasers; quantum-dot states; quantum-well states; Electrons; Laser excitation; Laser modes; Laser theory; Optical saturation; Performance gain; Quantum dot lasers; Quantum dots; Quantum mechanics; Quantum well lasers;
Conference_Titel :
Semiconductor Laser Conference, 2002. IEEE 18th International
Print_ISBN :
0-7803-7598-X
DOI :
10.1109/ISLC.2002.1041160
