Strong normal-incidence infrared absorption in self-organized InAs/InAlAs quantum dots grown on InP(001) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 1999

Strong normal-incidence infrared absorption in self-organized InAs/InAlAs quantum dots grown on InP(001)

Résumé

InAs self-assembled quantum dots in InAlAs matrix grown on InP001 substrates have been fabricated using Stranski-Krastanov growth mode. A strong in-plane polarized intraband absorption in the 10.6-20 m wavelength region has been observed and ascribed to a transition from the ground electron state to an excited state confined in the layer plane along the 110 direction. The absorption at normal-incidence reaches 7.8% for ten layers of n-doped quantum dots. The oscillator strength of the intraband transition is comparable to that achieved in quantum wells for a conduction band intersubband transition. The dependence of the intraband absorption on carrier concentration and temperature suggests a quantum-wire type confinement potential.
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hal-02111140 , version 1 (25-04-2019)

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A. Weber, Olivier Gauthier-Lafaye, F.H. Julien, Julien Brault, Michel Gendry, et al.. Strong normal-incidence infrared absorption in self-organized InAs/InAlAs quantum dots grown on InP(001). Applied Physics Letters, 1999, 74 (3), pp.413-415. ⟨10.1063/1.123045⟩. ⟨hal-02111140⟩
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