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Observation of confined states in anIn0.53Ga0.47As/In0.52Al0.48Asmulti-quantum wells structure by quantum confined Stark effects

✍ Scribed by K Tanaka; T Murata; N Kotera; H Nakamura

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
180 KB
Volume
29
Category
Article
ISSN
0749-6036

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✦ Synopsis

Photocurrent spectra in an In 0.53 Ga 0.47 As/In 0.52 Al 0.48 As multi-quantum wells structure containing 9.4 nm wide wells were measured at room temperature in electric fields. The exciton peaks of ground-state transitions shifted fairly in 167 kV cm -1 as the quantum confined Stark effect. Stark shifts were calculated by using the Runge-Kutta method using the effective mass equation with our experimental band parameters. Our parameters are the hole effective masses and valence band offset derived from saturation of a highest eigen energy, electron effective mass depending on energies and the conduction band offset derived from observed quantum number. It was possible to sufficiently use our experimental band parameters for the calculation of the Stark shift in the electric field.

πŸ“œ SIMILAR VOLUMES

Nonparabolic tendency of electron effect
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 πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 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