Skip to Main content Skip to Navigation
Journal articles

Optical properties of GaBiAs single quantum well structures grown by MBE

O Donmez 1 A Erol 1 A Arikan 1 M Makhloufi 2 Alexandre Arnoult 3 Chantal Fontaine 2
2 LAAS-PHOTO - Équipe Photonique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
3 LAAS-TEAM - Service Techniques et Équipements Appliqués à la Microélectronique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : In this study, molecular beam epitaxial-grown GaAs/GaBiAs single quantum well systems with two different Bi contents were investigated. Spectral dependence of room temperature photomodulated reflectance (PR) and photoluminescence (PL) measurements in the temperature range of 35–300 K were employed. PR spectra indicate that increasing Bi concentration promotes a tendency to approach quantized higher energy levels in the heavy and light holes' bands due to the different effects of compressive strain, which depends on Bi concentrations. In addition, a defect level is identified at 0.71 eV at room temperature PR spectra and is attributed to a AsGa antisite defect in GaAs barrier layers caused by the low temperature growth process. From the analysis of the temperature dependence of emission energy and amplitude in the PL spectra, localized states are determined in the range of 8 to 45 meV and attributed to the different bonding configuration of Bi clusters. Low temperature PL results imply that Bi cluster states tend to move into the valance band when Bi content increases from 2.4 to 7.0% in the GaBiAs system.
Complete list of metadatas

https://hal.laas.fr/hal-01943068
Contributor : Chantal Fontaine <>
Submitted on : Monday, December 3, 2018 - 3:49:18 PM
Last modification on : Friday, January 10, 2020 - 9:10:14 PM

Identifiers

Citation

O Donmez, A Erol, A Arikan, M Makhloufi, Alexandre Arnoult, et al.. Optical properties of GaBiAs single quantum well structures grown by MBE. Semiconductor Science and Technology, IOP Publishing, 2015, 30 (9), pp.094016. ⟨10.1088/0268-1242/30/9/094016⟩. ⟨hal-01943068⟩

Share

Metrics

Record views

68