Far field emission profile of pure wurtzite InP nanowires

Journal Article · Mon Nov 10 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4901437· OSTI ID:22391930

Bulgarini, Gabriele; Reimer, Michael E.; Zwiller, Val ^[1]; Dalacu, Dan; Poole, Philip J.; Lapointe, Jean ^[2]

---

1. Kavli Institute of Nanoscience, Delft University of Technology, Delft (Netherlands)
2. National Research Council, Ottawa, Ontario, K1A 0R6 (Canada)

We report on the far field emission profile of pure wurtzite InP nanowires in comparison to InP nanowires with predominantly zincblende crystal structure. The emission profile is measured on individual nanowires using Fourier microscopy. The most intense photoluminescence of wurtzite nanowires is collected at small angles with respect to the nanowire growth axis. In contrast, zincblende nanowires present a minimum of the collected light intensity in the direction of the nanowire growth. Results are explained by the orientation of electric dipoles responsible for the photoluminescence, which is different from wurtzite to zincblende. Wurtzite nanowires have dipoles oriented perpendicular to the nanowire growth direction, whereas zincblende nanowires have dipoles oriented along the nanowire axis. This interpretation is confirmed by both numerical simulations and polarization dependent photoluminescence spectroscopy. Knowledge of the dipole orientation in nanostructures is crucial for developing a wide range of photonic devices such as light-emitting diodes, photodetectors, and solar cells.

• OSTI ID: 22391930
• Journal Information: Applied Physics Letters, Vol. 105, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
CRYSTAL STRUCTURE
ELECTRIC DIPOLES
FIELD EMISSION
INDIUM PHOSPHIDES
LIGHT EMITTING DIODES
MICROSCOPY
NANOWIRES
ORIENTATION
PHOTODETECTORS
PHOTOLUMINESCENCE
POLARIZATION
SOLAR CELLS
SPECTROSCOPY
ZINC SULFIDES