Manipulation of emission energy in GaAs/AlGaAs core-shell nanowires with radial heterostructure

Journal Article · Fri Mar 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869218· OSTI ID:22271206

Barbosa, B. G.; Arakaki, H.; Souza, C. A. de; Pusep, Yu. A. ^[1]

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1. Instituto de Fisica de São Carlos, Universidade de São Paulo, 13560-970 Sao Carlos, SP (Brazil)

Photoluminescence was studied in GaAs/AlGaAs nanowires (NWs) with different radial heterostructures. We demonstrated that manipulation of the emission energy may be achieved by appropriate choice of the shell structure. The emission at highest energy is generated in the NWs with tunneling thin AlGaAs inner shell and thin GaAs outer shell due to recombination of the photoexcited electrons confined in the outer shell with the holes in the core. Lower energy emission was shown to occur in the NWs with thick outer shell grown in the form of a short-period GaAs/AlGaAs multiple quantum well structure. In this case, the tunneling probability through the multiple quantum wells controls the energy emitted by the NWs. The doping of core results in dominated low energy emission from the GaAs core.

• OSTI ID: 22271206
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM ARSENIDES
ELECTRONS
GALLIUM ARSENIDES
HETEROJUNCTIONS
HOLES
PHOTOLUMINESCENCE
PROBABILITY
QUANTUM WELLS
QUANTUM WIRES
RECOMBINATION
TUNNEL EFFECT