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On the optical modal gain of coupled quantum wells
Author(s) -
Kucharczyk M.,
Wartak M. S.,
Rusek P.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990905)22:5<301::aid-mop4>3.0.co;2-q
Subject(s) - quantum well , microwave , mixing (physics) , envelope (radar) , modal , physics , coupling (piping) , quantum , effective mass (spring–mass system) , optoelectronics , optics , computational physics , quantum mechanics , quantum electrodynamics , laser , materials science , engineering , telecommunications , radar , polymer chemistry , metallurgy
Optical modal gain has been investigated for coupled quantum wells. Subband energies and envelope functions were determined by solving the Luttinger–Kohn effective mass equation including band mixing. The analysis was performed for GaAs–Al 0.3 Ga 0.7 As system, and shows that well coupling substantially shifts the spectral gain peak and band mixing reduces the gain peak as compared to the parabolic model. The implications for the design of semiconductor lasers based on coupled quantum wells are briefly discussed. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 301–304, 1999.