Terahertz spectra and soft optical phonons of PbB4O7 crystal

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	Terahertz spectra and soft optical phonons of PbB4O7 crystal
	Hou, BH ; Jian, YZ ; Wang, YL ; Zhang, EP ; Fu, PZ ; Wang, L ; Zhong, RB
刊名	ACTA PHYSICA SINICA
	2010
卷号	59 期号:7 页码:4640
关键词	TIME-DOMAIN SPECTROSCOPY RAMAN
ISSN号	1000-3290
通讯作者	Hou, BH (reprint author), Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China.
中文摘要	The terahertz (10(12) Hz) spectra, Raman spectra and infrared visible - UV spectra are analyzed for PbB4O7 crystal sample. A resonance peak appears in the curve of the dielectric function epsilon(v) in the frequency range of 0. 25-2. 5 THz. The analysis supports that soft optical phonons exist in PbB4O7 crystal from four aspects; 1) the change curve e(v) of the dielectric function satisfies the Lyddane-Sachs-Teller relation; 2) a strong Raman scattering peak appears in the vicinity of resonance frequency (3. 10 THz); 3) absorption coefficient curve a(v) meets the characteristics of polaritons; 4) the dispersion relation curve v(k) of the photon transmitting from the crystal reveals a frequency gap. The soft optical phonon exists in PbB4O7 crystal, which means that the frequency curve of the photon transmitting from the crystal will suffer splitting when the condition of producing polariton is satisfied. And the dispersion curve splits a higher branch and a lower one. This may help us find a new method of changing the frequency of the photon.
收录类别	SCI
资助信息	National Basic Research Program of China [2007CB310401]; National Natural Science Foundation of China [50672104]
语种	中文
公开日期	2013-09-23
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/44851]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Hou, BH,Jian, YZ,Wang, YL,et al. Terahertz spectra and soft optical phonons of PbB4O7 crystal[J]. ACTA PHYSICA SINICA,2010,59(7):4640.
APA	Hou, BH.,Jian, YZ.,Wang, YL.,Zhang, EP.,Fu, PZ.,...&Zhong, RB.(2010).Terahertz spectra and soft optical phonons of PbB4O7 crystal.ACTA PHYSICA SINICA,59(7),4640.
MLA	Hou, BH,et al."Terahertz spectra and soft optical phonons of PbB4O7 crystal".ACTA PHYSICA SINICA 59.7(2010):4640.