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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 10 — May. 20, 2013
  • pp: 11715–11727

Generalized Pseudo-Unit-Cell model for long-wavelength optical phonons of multinary mixed crystals: Application to AxB1-xCyD1-y type mixed crystals

Zhenfeng Liao, Jingzhen Li, Ruisheng Zheng, Xiaowei Lu, and Hongyi Chen  »View Author Affiliations


Optics Express, Vol. 21, Issue 10, pp. 11715-11727 (2013)
http://dx.doi.org/10.1364/OE.21.011715


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Abstract

Long-wavelength optical phonons in multinary mixed crystals are studied based on the Pseudo-Unit-Cell model. A unitary matrix method is developed to calculate the eigenfrequencies of optical phonons in multinary mixed crystals. The analytical expressions of oscillator strengths and dielectric constants of the multinary mixed crystals are obtained as a function of the phonon frequencies. The results indicate that the composition dependence of oscillator strengths shows clearly the phonon-mode behaviors of the mixed crystals. The theory and calculation method can be applied to any type of multinary mixed crystals. It is found that there is a composition independent point for the dielectric constant of quaternary mixed crystals.

© 2013 OSA

OCIS Codes
(160.0160) Materials : Materials
(160.4760) Materials : Optical properties

ToC Category:
Materials

History
Original Manuscript: March 22, 2013
Revised Manuscript: April 18, 2013
Manuscript Accepted: April 23, 2013
Published: May 6, 2013

Citation
Zhenfeng Liao, Jingzhen Li, Ruisheng Zheng, Xiaowei Lu, and Hongyi Chen, "Generalized Pseudo-Unit-Cell model for long-wavelength optical phonons of multinary mixed crystals: Application to AxB1-xCyD1-y type mixed crystals," Opt. Express 21, 11715-11727 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-10-11715


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