Effects of structure distortion on optical phonon properties of crystalline beta-BaTeMo2O9-A novel nonlinear optical material: Infrared and Raman spectra as well as first-principles calculations  Raman spectra as well as first-principles calculations

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	Effects of structure distortion on optical phonon properties of crystalline beta-BaTeMo2O9-A novel nonlinear optical material: Infrared and Raman spectra as well as first-principles calculations Raman spectra as well as first-principles calculations
	S.T.Zhou Y.Huang W.Y.Qiu Y.L.Li S.M.He J.J.Zhang B.Zhang X.S.Chen X.T.TaoandW.Lu
刊名	J.Appl.Phys
	2013
卷号	114 期号:23
关键词	Phonons Ramanspectra Grouptheory Reflectivity Infraredspectra
英文摘要	The infrared dielectric property of monoclinic BaTeMo2O9 single crystals is studied by polarized IR reflectance spectra from 20 to 1800 cm−1. Based on the modified Lorentz model, the frequencies, strengths, and dampings of TO modes as well as the orientations of the dipole momenta are determined, agreeing well with Raman spectra and results from First-principles calculation. The observed modes are visually assigned to the specific atoms' motions in the primitive cell based on the theory calculations. A large shift of the internal modes of the anion groups relative to free anion co-ordination polyhedra is observed, which can be used to indicate the distortions of co-ordination polyhedra related to the nonlinear optical properties. Further, the experimental results of the strengths of the oscillators support the elimination and splitting of degenerate modes in free regular polyhedrons. These results offer a way to evaluate the nonlinear optical properties by use of traditional IR reflectivity spectra.
学科主题	红外基础研究
公开日期	2014-11-10
内容类型	期刊论文
源URL	[http://202.127.1.142/handle/181331/7728]
专题	上海技术物理研究所_上海技物所
推荐引用方式 GB/T 7714	S.T.Zhou Y.Huang W.Y.Qiu Y.L.Li S.M.He J.J.Zhang B.Zhang X.S.Chen X.T.TaoandW.Lu. Effects of structure distortion on optical phonon properties of crystalline beta-BaTeMo2O9-A novel nonlinear optical material: Infrared and Raman spectra as well as first-principles calculations Raman spectra as well as first-principles calculations[J]. J.Appl.Phys,2013,114(23).
APA	S.T.Zhou Y.Huang W.Y.Qiu Y.L.Li S.M.He J.J.Zhang B.Zhang X.S.Chen X.T.TaoandW.Lu.(2013).Effects of structure distortion on optical phonon properties of crystalline beta-BaTeMo2O9-A novel nonlinear optical material: Infrared and Raman spectra as well as first-principles calculations Raman spectra as well as first-principles calculations.J.Appl.Phys,114(23).
MLA	S.T.Zhou Y.Huang W.Y.Qiu Y.L.Li S.M.He J.J.Zhang B.Zhang X.S.Chen X.T.TaoandW.Lu."Effects of structure distortion on optical phonon properties of crystalline beta-BaTeMo2O9-A novel nonlinear optical material: Infrared and Raman spectra as well as first-principles calculations Raman spectra as well as first-principles calculations".J.Appl.Phys 114.23(2013).