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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 21 — Oct. 8, 2012
  • pp: 23281–23289

Raman probing of competitive laser heating and local recrystallization effect in ZnO nanocrystals

J. D. Ye, P. Parkinson, F.F. Ren, S. L. Gu, H.H. Tan, and C. Jagadish  »View Author Affiliations


Optics Express, Vol. 20, Issue 21, pp. 23281-23289 (2012)
http://dx.doi.org/10.1364/OE.20.023281


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Abstract

The competitive laser-induced local heating and recrystallization effects in ZnO nanocrystals embedded in a MgO/ZnO stack are reported via resonance Raman spectra. The dependence of the intensity, energy, and resonance effects of the longitudinal optical (LO) phonon on laser excitation condition are discussed in the context of Fröhlich interaction. Redistribution of defects, impurity-diffusion, and grain regrowth caused by thermal and photochemical effects lead to significant changes in coupling strength of electron-phonon interaction, and the resonance behaviors are strongly affected by the interplay of local heating, heat trapping, and local structural modification in such nanostructures.

© 2012 OSA

OCIS Codes
(140.3550) Lasers and laser optics : Lasers, Raman
(160.4760) Materials : Optical properties
(160.6000) Materials : Semiconductor materials
(160.4236) Materials : Nanomaterials

ToC Category:
Materials

History
Original Manuscript: May 18, 2012
Revised Manuscript: July 27, 2012
Manuscript Accepted: September 12, 2012
Published: September 25, 2012

Citation
J. D. Ye, P. Parkinson, F.F. Ren, S. L. Gu, H.H. Tan, and C. Jagadish, "Raman probing of competitive laser heating and local recrystallization effect in ZnO nanocrystals," Opt. Express 20, 23281-23289 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-21-23281


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