1. Polychromatic emission in a wide energy range from InP-InAs-InP multi-shell nanowires
- Author
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Xiaodong Han, Ang Li, Shiyao Wu, Shan Xiao, Xiulai Xu, Fabio Beltram, Guido Goldoni, Lucia Sorba, Francesco Rossella, Sergio Battiato, Valentina Zannier, Andrea Bertoni, Battiato, S., Wu, S., Zannier, V., Bertoni, A., Goldoni, G., Li, A., Xiao, S., Han, X. D., Beltram, F., Sorba, L., Xu, X., and Rossella, F.
- Subjects
Photoluminescence ,Materials science ,Nanostructure ,Nanowire ,Bioengineering ,Chemistry (all) ,Materials Science (all) ,Mechanics of Materials ,Mechanical Engineering ,Electrical and Electronic Engineering ,InP-InAs-InP heterostructure ,02 engineering and technology ,multi-shell nanowire ,010402 general chemistry ,01 natural sciences ,Spectral line ,Crystal ,Mechanics of Material ,General Materials Science ,Wurtzite crystal structure ,business.industry ,General Chemistry ,Atmospheric temperature range ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Optoelectronics ,photoluminescence ,0210 nano-technology ,Luminescence ,business - Abstract
InP-InAs-InP multi-shell nanowires (NWs) were grown in the wurtzite (WZ) or zincblende (ZB) crystal phase and their photoluminescence (PL) properties were investigated at low temperature (?6 K) for different measurement geometries. PL emissions from the NWs were carefully studied in a wide energy range from 0.7 to 1.6 eV. The different features observed in the PL spectra for increasing energies are attributed to four distinct emitting domains of these nano-heterostructures: the InAs island (axially grown), the thin InAs capping shell (radially grown), the crystal-phase quantum disks arising from the coexistence of InP ZB and WZ segments in the same NW, and the InP portions of the NW. These results provide a useful frame for the rational implementation of InP-InAs-InP multi-shell NWs containing various quantum confined domains as polychromatic optically active components in nanodevices for quantum information and communication technologies.
- Published
- 2019
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