CARRIER TRANSPORT IN ASYMMETRICALLY CONFINED 1.55 MU-M MULTIPLE-QUANTUM-WELL LASER STRUCTURES

Citation
M. Zimmermann et al., CARRIER TRANSPORT IN ASYMMETRICALLY CONFINED 1.55 MU-M MULTIPLE-QUANTUM-WELL LASER STRUCTURES, Applied physics letters, 69(16), 1996, pp. 2324-2326
Citations number
14
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00036951
Volume
69
Issue
16
Year of publication
1996
Pages
2324 - 2326
Database
ISI
SICI code
0003-6951(1996)69:16<2324:CTIAC1>2.0.ZU;2-P
Abstract
Asymmetrically confined multiple quantum well laser structures have re cently been very successful in reaching high modulation bandwidths up to 26 GHz, reported in the IncaAs/InGaAlAs material system. We have me asured the effective carrier transport time in structures of this kind by performing parasitic-free optical modulation experiments. The resu lt is one specific transport time for each confinement layer width. We show that down to layer widths of about 100 nm this effective time fo r both types of carriers is given by a pure diffusion process for InGa As/InGaAlAs. Finally, a diffusion constant for the barrier/confinement carriers results in InGaAlAs material which is in very good agreement with reported mobilities. (C) 1996 American Institute of Physics.