Applied Physics B

, 93:231

ZnO lasing in complex systems with tetrapods

  • V. M. Markushev
  • V. V. Ursaki
  • M. V. Ryzhkov
  • C. M. Briskina
  • I. M. Tiginyanu
  • E. V. Rusu
  • A. A. Zakhidov
Article

DOI: 10.1007/s00340-008-3153-9

Cite this article as:
Markushev, V.M., Ursaki, V.V., Ryzhkov, M.V. et al. Appl. Phys. B (2008) 93: 231. doi:10.1007/s00340-008-3153-9

Abstract

A ZnO structure in the form of a core–shell wire was grown with a modified vapour transport and condensation method. The wire consists of a dense core which may play the role of a waveguide and a shell formed mainly from tetrapod-type crystallites. The high optical quality of the produced ZnO material is confirmed by continuous wave photoluminescence (PL) analysis demonstrating that low- temperature PL is related to the recombination of bound excitons, while room-temperature PL is due to free excitons. Good quality of the crystal structure is demonstrated also by the Raman spectrum. The shell of the wire exhibits room-temperature laser action due to lasing modes in tetrapods under the excitation by nanosecond laser pulses. The nature of the lasing modes is discussed. A simplified model for one of the possible modes is suggested.

PACS

89.20.Bb 42.60.Jf 42.70.Hj 

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • V. M. Markushev
    • 1
  • V. V. Ursaki
    • 2
  • M. V. Ryzhkov
    • 1
  • C. M. Briskina
    • 1
  • I. M. Tiginyanu
    • 2
  • E. V. Rusu
    • 2
  • A. A. Zakhidov
    • 3
  1. 1.Institute of Radio Engineering and Electronics of RASMoscowRussia
  2. 2.Laboratory of Low-Dimensional Semiconductor Structures, Institute of Applied PhysicsAcademy of Sciences of MoldovaChisinauMoldova
  3. 3.NanoTech InstituteUniversity of Texas at DallasRichardsonUSA

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