| KDP晶体的太赫兹光谱研究 |
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| 引用本文： | 崔德勇,张晓霞,熊煜,钱铄. KDP晶体的太赫兹光谱研究[J]. 光学与光电技术, 2012, 0(1): 84-87 |
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| 作者姓名： | 崔德勇 张晓霞 熊煜 钱铄 |
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| 作者单位： | 电子科技大学光电信息学院 |
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| 基金项目： | 国家高科技研究发展计划(863计划)新材料领域(2009AA03Z413)资助项目 |
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| 摘 要： | 实验测量了室温下磷酸二氢钾（KDP）晶体0．2～1．6THz的时域光谱，以及50～4000cm叫范围内的远红外光谱，200～2000nm的紫外一可见一红外光谱。KDP晶体的禁带宽度是5．91eV，在测量范围内有一个很宽的声子吸收带，从0．2～205．5THz吸收系数在35～80cm-1，声子吸收的低频端小于0．2THz。最高的纵光学模声子的频率大约是205．5THz，由此求出这支声子的H—O键的力常数为13．13N·cm-1。
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| 关 键 词： | THz光谱 红外一紫外光谱 KH2PO4 晶体 声子吸收 |
THz Spectra of KDP Crystal |
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| CUI De-yong,ZHANG Xiao-xia,XIONG Yu,QIAN Shuo. THz Spectra of KDP Crystal[J]. optics&optoelectronic technology, 2012, 0(1): 84-87 |
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| Authors: | CUI De-yong ZHANG Xiao-xia XIONG Yu QIAN Shuo |
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| Affiliation: | (School of Optoelectronic Information,University of Electronic Science and Technology of China,Chengdu 610054,China |
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| Abstract: | THz time domain spectrurn of KH2 PO4 crystal in the range from 0. 2 to 1.6 THz, the far-infrared spectrum in the range from 50～4 000 cm 1, and ultraviolet-visible-infrared spectrum in the range from 200～2 000 nm are measured at the room temperature.The energy band gap Eg of KH2 PO4 crystal is 5.91 eV. There is a wide band of the phonon absorption in the KDP crystal.The values of the absorption coefficient are 35～80 cm-1 in the range from 0. 2 to 205.5 THz. The end of the low frequency of the optical phonon model is smaller than 0. 2 THz. The highest frequency νLO of the longitudinal optical phonon model LO is about 205.5 THz, and the force constant κ of H—O ionic chemical bond stretch vibration from the ωLO is calculated to be 13.13 N·cm-1. |
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| Keywords: | THz spectrum infrared-ultraviolet spectrum,KH2PO4 crystal phonon absorption |
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