Quantum confinement of excitons in wurtzite InP nanowires

Quantum confinement of excitons in wurtzite InP nanowires

Exciton resonances are observed in photocurrent spectra of 80 nm wurtzite InP nanowire devices at low temperatures, which correspond to transitions between the A, B, and C valence bands and the lower conduction band. Photocurrent spectra for 30 nm WZ nanowires exhibit shifts of the exciton resonance...

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Veröffentlicht in:Journal of applied physics 2015-05, Vol.117 (19)
Hauptverfasser: Pemasiri, K., Jackson, H. E., Smith, L. M., Wong, B. M., Paiman, S., Gao, Q., Tan, H. H., Jagadish, C.
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Conduction bands
CUBIC LATTICES
ELECTRONIC STRUCTURE
ELECTRONS
EXCITONS
FINITE ELEMENT METHOD
HOLES
INDIUM PHOSPHIDES
NANOSCIENCE AND NANOTECHNOLOGY
NANOWIRES
PHOTOCURRENTS
Photoelectric effect
Photoelectric emission
Quantum confinement
TEMPERATURE DEPENDENCE
VALENCE
Wave functions
Wurtzite
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Zusammenfassung:Exciton resonances are observed in photocurrent spectra of 80 nm wurtzite InP nanowire devices at low temperatures, which correspond to transitions between the A, B, and C valence bands and the lower conduction band. Photocurrent spectra for 30 nm WZ nanowires exhibit shifts of the exciton resonances to higher energy, which are consistent with finite element calculations of wavefunctions of the confined electrons and holes for the various bands.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4921109