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Estimation of electron effective mass in InGaAs/InAlAs multi-quantum well structures using photocurrent spectroscopy

✍ Scribed by K. Tanaka; N. Kotera; H. Nakamura

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 298 KB
Volume: 47
Category: Article
ISSN: 0167-9317
DOI: 10.1016/s0167-9317(99)00221-x

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✦ Synopsis

Interband optical transit,ions of Ino.53Gao.*7As/Ino.s2Alo.48As multi-quantum wells have been clearly observed in photocurrent spectra. Interband transitions were assigned from the spectral structures.

Eigen-energies of conduction band were not proportional to the square of quantum numbers. An electron effective mass normal to the quantum well plane was 50'%-heavier than the bulk bandedge mass of InGaAs.

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Nonparabolic tendency of electron effective mass estimated by confined states in In0.53Ga0.47As/In0.52Al0.48As multi-quantum-well structures

✍ K Tanaka; N Kotera; H Nakamura 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 76 KB

We observed that a series of peaks, which were clearly extracted from a photocurrent difference spectrum, corresponded to interband optical transitions of an In 0.53 Ga 0.47 As/ In 0.52 Al 0.48 As multi-quantum wells structure. The nonparabolic tendency of the electron effective mass was suggested f