Title :
Theoretical study of differential gain in strained quantum well structures
Author_Institution :
Fac. of Eng., Hiroshima Univ., Higashihiroshima, Japan
fDate :
5/1/1991 12:00:00 AM
Abstract :
The differential gain expected in a strained quantum well (QW) and in a lattice-matched QW is discussed based on a theoretical treatment of the band structures where the band nonparabolicity is taken into account. The differential gain in strained QWs will be larger by about three to four times relative to lattice-matched QWs, and a maximum differential gain of 4-6×10-15 cm2 will be possible in strained QWs. The anisotropy of the subband nonparabolicity in lattice-matched QWs contributes to the larger difference between the two types of QWs. The calculated band-edge effective masses and the calculated laser properties, are compared to the available measurements, and some comments are given for realizing high-speed strained lasers
Keywords :
effective mass (band structure); interface electron states; semiconductor junction lasers; semiconductor quantum wells; band nonparabolicity; band structures; band-edge effective masses; calculated laser properties; differential gain; high-speed strained lasers; lattice matched quantum wells; strained quantum well structures; subband nonparabolicity; theoretical treatment; Cutoff frequency; Effective mass; High speed optical techniques; Laser beam cutting; Nonlinear optics; Optical films; Optical saturation; Quantum mechanics; Quantum well lasers; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
