This article is cited in 5 papers

Low-dimensional systems

The dependence of the lasing threshold in ZnO nanorods on their length

A. N. Gruzintsev^a, G. A. Emel'chenko^b, A. N. Redkin^a, V. T. Volkov^a, E. E. Yakimov^a, G. Visimberga<sup>c

a</sup> Institute of Microelectronics Technology and High-Purity Materials RAS
^b Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region
^c Tyndall National Institute, University College Cork, Prospect Row, Cork, Ireland

Abstract: The effect of the length of ZnO nanorods on the mode structure and thresholds of stimulated and laser luminescence in the ultraviolet spectral region is studied. It is shown that nanorods with a metal mirror at the end face exhibit the minimum optical excitation power threshold in the case of long nanoresonators. Single-mode lasing is observed in short ZnO nanorods. Variations in the lasing thresholds are attributed to differences in the length of the amplifying medium and in the local densities of photon states in regularly shaped nanocrystals.

Received: 13.02.2010
Accepted: 17.02.2010

 English version: Semiconductors, 2010, 44:9, 1217–1221

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