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Polychromatic emission in a wide energy range from InP-InAs-InP multi-shell nanowires
S Battiato1, S Wu2, V Zannier1
1NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56217 Pisa, Italy.
Nanotechnology
|January 12, 2019
Summary
Indium phosphide-indium arsenide-indium phosphide multi-shell nanowires exhibit distinct photoluminescence properties. These nano-heterostructures offer potential for polychromatic optical components in quantum information devices.
Area of Science:
- Materials Science
- Nanotechnology
- Quantum Optics
Background:
- Indium phosphide-indium arsenide-indium phosphide (InP-InAs-InP) multi-shell nanowires (NWs) are advanced semiconductor nanostructures.
- Understanding their optical properties is crucial for developing novel optoelectronic devices.
Purpose of the Study:
- Investigate the low-temperature photoluminescence (PL) properties of InP-InAs-InP multi-shell NWs.
- Characterize emissions across a wide energy range (0.7–1.6 eV).
- Identify distinct emitting domains within the nano-heterostructures.
Main Methods:
- Growth of InP-InAs-InP multi-shell NWs in wurtzite (WZ) or zincblende (ZB) crystal phases.
- Low-temperature (≈6 K) photoluminescence spectroscopy.
- Analysis of PL spectra across different measurement geometries.
Main Results:
- Observed PL emissions attributed to four distinct domains: InAs island, InAs capping shell, crystal-phase quantum disks, and InP segments.
- Emissions analyzed in the energy range of 0.7–1.6 eV.
- Correlation between NW structure (WZ/ZB phases) and optical emission characteristics.
Conclusions:
- The study elucidates the origin of diverse optical emissions in InP-InAs-InP multi-shell NWs.
- These NWs, with their multiple quantum-confined domains, are promising for polychromatic applications.
- Results provide a framework for designing nanodevices for quantum information and communication technologies.
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