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Journal of Applied Physics / Volume 108 / Issue 4 / ARTICLES / Lasers, Optics, and Optoelectronics

J. Appl. Phys. 108, 043107 (2010); http://dx.doi.org/10.1063/1.3468632 (6 pages)

Multiphoton-absorption induced ultraviolet luminescence of ZnO nanorods using low-energy femtosecond pulses

Susanta Kumar Das1, Mahua Biswas2, Daragh Byrne2, Martin Bock1, Enda McGlynn2, Markus Breusing1, and Ruediger Grunwald1

1Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2a, D-12489 Berlin, Germany
2School of Physical Sciences, NCPST, Dublin City University, Glasnevin, Dublin 9, Ireland

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(Received 1 March 2010; accepted 30 June 2010; published online 25 August 2010)

Multiphoton-absorption (MPA) induced ultraviolet (UV) luminescence of ZnO nanorods grown by vapor phase transport was demonstrated using ultrafast excitation at pulse energies in the few nanojoules range, directly generated by a Ti:sapphire laser oscillator at wavelengths around 800 nm. The dependence of the UV luminescence on the excitation density reveals a two-photon absorption process as the responsible excitation mechanism. The broad spectral bandwidth of the excitation pulses obviously promotes the feasibility of the observed two-photon channel. Theoretical estimates concerning the contribution of nonlinear absorbance strongly support the experimental findings. The essential conditions for proper utilization of this process are discussed.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

absorption, II-VI semiconductors, nanorods, photoluminescence, two-photon processes, wide band gap semiconductors, zinc compounds

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3468632

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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