Effects of stress on the optical properties of epitaxial Nd-doped Sr0.5Ba0.5Nb2O6films

Y. B. Yao; W. C. Liu; Chee Leung Mak; K. H. Wong

doi:10.1063/1.3647516

Effects of stress on the optical properties of epitaxial Nd-doped Sr_0.5Ba_0.5Nb₂O₆films

Y. B. Yao, W. C. Liu, Chee Leung Mak, K. H. Wong

Research output: Journal article publication › Journal article › Academic research › peer-review

14 Citations (Scopus)

Abstract

Nd-doped Sr0.5Ba0.5Nb2O6(SBN) thin films with thicknesses ranging from 15 nm to 460 nm were grown on MgO (100) substrates using pulsed laser deposition technique. X-ray diffraction studies showed that the films were highly (001)-oriented and epitaxially grown on the substrates. Raman spectroscopy revealed the presence of residual stresses in the films especially for those with thicknesses below 100 nm. Transmittance and photoluminescence spectra revealed that the band-gap energies as well as the light-induced emission bands were shifted to higher energies as the film thickness decreased. The Nd3emission lines in the films were also dependent on film thickness. Origins of these observations were discussed based upon the stress as well as grain size effects.

Original language	English
Article number	032172
Journal	AIP Advances
Volume	1
Issue number	3
DOIs	https://doi.org/10.1063/1.3647516
Publication status	Published - 11 Oct 2011

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.3647516

http://hdl.handle.net/10397/4578

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AU - Wong, K. H.

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AB - Nd-doped Sr0.5Ba0.5Nb2O6(SBN) thin films with thicknesses ranging from 15 nm to 460 nm were grown on MgO (100) substrates using pulsed laser deposition technique. X-ray diffraction studies showed that the films were highly (001)-oriented and epitaxially grown on the substrates. Raman spectroscopy revealed the presence of residual stresses in the films especially for those with thicknesses below 100 nm. Transmittance and photoluminescence spectra revealed that the band-gap energies as well as the light-induced emission bands were shifted to higher energies as the film thickness decreased. The Nd3emission lines in the films were also dependent on film thickness. Origins of these observations were discussed based upon the stress as well as grain size effects.

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Effects of stress on the optical properties of epitaxial Nd-doped Sr_0.5Ba_0.5Nb₂O₆films

Abstract

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