Linear and Nonlinear Optical Properties of Single GaAs Nanowires with Polytypism
- Resource Type
- Authors
- D. C. Teles Ferreira; M. V. B. Moreira; Franklin M. Matinaga; A. C. S. Pimenta; J. C. González; A. G. de Oliveira; M. De Giorgi; Daniele Sanvitto; D. B. Roa
- Source
- The Journal of Physical Chemistry C. 120:17046-17051
- Subject
- Photoluminescence
Materials science
Scattering
Nanowire
Second-harmonic generation
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Molecular physics
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Crystal
Crystallography
General Energy
0103 physical sciences
Microscopy
Physical and Theoretical Chemistry
010306 general physics
0210 nano-technology
Spectroscopy
Wurtzite crystal structure
- Language
- ISSN
- 1932-7455
1932-7447
We report the linear and nonlinear optical properties of single GaAs nanowires with polytypism effect. Electron transmission microscopy experiments show that the nanowires contain wurtzite segments as well as zinc blende segments with two different crystallographic orientations. Time-resolved photoluminescence spectroscopy of single nanowires shows ultrafast radiative recombination lifetimes in the range of 20–70 ps as a consequence of the charge scattering in the type-II band alignment between WZ and ZB segments and or by the high surface area of the nanowires. Polarization resolved second harmonic generation in the nanowires found to be highly sensitive to the crystallography of the nanowires. All three crystal axes orientations of the nanowires were determined. Furthermore, the volume fraction of the ZB segments oriented in the [0–11] and in the [01–1] directions was precisely determined for the first time by optical measurement besides the TEM technique.