Nano letters, 2008-06, Vol.8 (6), p.1619-1624
2008
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Details
- Autor(en) / Beteiligte
- Titel
- Ultrafast Electron and Hole Dynamics in Germanium Nanowires
- Ist Teil von
- Nano letters, 2008-06, Vol.8 (6), p.1619-1624
- Ort / Verlag
- Washington, DC: American Chemical Society
- Erscheinungsjahr
- 2008
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- We present the first ultrafast time-resolved optical measurements, to the best of our knowledge, on ensembles of germanium nanowires. Vertically aligned germanium nanowires with mean diameters of 18 and 30 nm are grown on (111) silicon substrates through chemical vapor deposition. We optically inject electron−hole pairs into the nanowires and exploit the indirect band structure of germanium to separately probe electron and hole dynamics with femtosecond time resolution. We find that the lifetime of both electrons and holes decreases with decreasing nanowire diameter, demonstrating that surface effects dominate carrier relaxation in semiconductor nanowires.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1530-6984eISSN: 1530-6992DOI: 10.1021/nl080202+Titel-ID: cdi_proquest_miscellaneous_71666511
- Format
- –
- Schlagworte
- Chemical vapor deposition (including plasma-enhanced cvd, mocvd, etc.), Condensed matter: electronic structure, electrical, magnetic, and optical properties, Cross-disciplinary physics: materials science, rheology, Electron Transport, Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures, Electronic structure of nanoscale materials : clusters, nanoparticles, nanotubes, and nanocrystals, Electronic transport in multilayers, nanoscale materials and structures, Electrons, Exact sciences and technology, Germanium - chemistry, Germanium - radiation effects, Light, Materials science, Methods of deposition of films and coatings, film growth and epitaxy, Nanocrystalline materials, Nanoscale materials and structures: fabrication and characterization, Nanotubes - chemistry, Nanotubes - radiation effects, Nanotubes - ultrastructure, Physics, Quantum wires, Semiconductors