Room-temperature optical absorption and confinement effect in Ga0.47In0.53As/Al0.48In0.52As MQW
Room-temperature optical absorption in MBE-grown multiple-quantum well (MQW) samples of GaInAs/AlInAs with 100 AA wells and 100 AA barrier has been investigated. The specimens consisted of 30 periods of a nominally undoped MQW region sandwiched between 100 AA layers of undoped AlInAs with a 50 AA GaAs cap. The optical absorption data, in conjunction with calculated energy levels based on nonparabolic effective-mass theory, yielded information about the quantum confinement effect in the structure.