Carrier relaxation and stimulated emission in ZnO nanorods grown by catalyst-assisted vapor transport on various substrates

V. Avrutin, Ü Özgür, N. Izyumskaya, S. Chevtchenko, J. Leach, J. C. Moore, A. A. Baski, C. Litton, H. O. Everitt, Kong-Thon Tsen, M. Abouzaid, P. Ruterana, H. Morkoç

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


ZnO nanorods were grown by catalyst-assisted vapor phase transport on Si(001), GaN(0001)/c-Al2O3, and bulk ZnO(0001) substrates. Morphology studies as well as X-ray diffraction and transmission electron microscopy showed that ZnO nanorods grew mostly perpendicular to the GaN(0001) and ZnO(0001) substrate surface, whereas a more random directional distribution was found for nanorods on Si(001). Comprehensive optical properties of nanorods were studied by steady-state photoluminescence and time-resolved photoluminescence. Stimulated emission was observed from ZnO nanorods on GaN(0001)/c-Al2O3 substrates, most likely due to their vertical orientation. Near-field scanning optical microscopy was applied to investigate luminescent properties of individual rods. Raman spectroscopy revealed biaxial compressive strain in the nanorod samples grown on Si(001). The strain magnitude was reducing with increasing length of the nanorods. Conductive atomic force microscopy showed that nanorods are electrically isolated from each other. I-V spectra of individual nanorods were measured.

Original languageEnglish (US)
Title of host publicationZinc Oxide Materials and Devices II
StatePublished - 2007
EventZinc Oxide Materials and Devices II - San Jose, CA, United States
Duration: Jan 21 2007Jan 24 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherZinc Oxide Materials and Devices II
Country/TerritoryUnited States
CitySan Jose, CA


  • Microscopy
  • Nanostructures
  • Optical properties
  • Structural properties
  • ZnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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