Growth and characterization of InP nanowires with InAsP insertions.
We report on the fabrication by Au-assisted molecular beam epitaxy of InP nanowires with embedded InAsP insertions. The growth temperature affects the nucleation on the nanowire lateral surface. It is therefore possible to grow the wires in two steps: to fabricate an axial heterostructure (at 420 degrees C), and then cover it by a shell (at 390 degrees C). The InAsP alloy composition could be varied between InAs0.35P0.65 and InAs0.5P0.5 by changing the As to P flux ratio. When a shell is present, the InAsP segments show strong room-temperature photoluminescence with a peak wavelength tunable from 1.2 to 1.55 mum by adjusting the As content. If the axial heterostructure has no shell, luminescence intensity is drastically reduced. Low-temperature microphotoluminescence performed on isolated single wires shows narrow peaks with a line width as small as 120 microeV.
Tchernycheva
Maria
M
CNRS-LPN, Route de Nozay, 91460 Marcoussis, France. maria.tchernycheva@lpn.cnrs.fr
Cirlin
George E
GE
Patriarche
Gilles
G
Travers
Laurent
L
Zwiller
Valery
V
Perinetti
Umberto
U
Harmand
Jean-Christophe
JC
D001152:Arsenicals / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D007204:Indium / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D010720:Phosphines / Q000737:chemistry*; D013499:Surface Properties
D001152:Arsenicals; D046911:Macromolecular Substances; D010720:Phosphines; D007204:Indium; C076773:indium arsenide; C090882:indium phosphide