期刊
NANOTECHNOLOGY
卷 30, 期 19, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aafde4
关键词
InP-InAs-InP heterostructure; multi-shell nanowire; photoluminescence
资金
- National Natural Science Foundation of China [11721404, 51761145104, 61675228, 11874419, 51872008]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB07030200, XDB28000000]
- CAS Interdisciplinary Innovation Team
- SUPERTOP project, QUANTERA ERA-NET Cofound in Quantum Technologies
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 (approximate to 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 nanoheterostructures: 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.
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