摘要
硫化锌材料是长波红外光学窗口材料优选材料之一.针对化学气相沉积(CVD)和热压成形(HP)两种工艺制备的硫化锌材料,研究了从室温到600℃的光谱透过率变化现象,基于二维相关光谱分析技术,获得了长波吸收区内的声子交互作用.研究结果表明:在700~1250 cm^(-1)的长波吸收波段,CVD ZnS的声子频率为横向振动模式下(TO)的三次谐波频率和纵向声学模式下(LA)的三次谐波频率;HP ZnS的声子频率分别为3TO、3LA和4LA,并且在温度作用下的响应顺序依次为3LA、3TO和4LA.两种工艺制备的ZnS杂质振动吸收在温度作用下对2 000~1 250 cm^(-1)范围内的光谱透过率产生影响,出现不同程度的透过率增加现象,由于两者含有杂质的区别,在高温下CVD ZnS的透过率变化比HP ZnS较为显著.
Zinc sulfide material is one of the important materials for infrared optical windowin the long wavelength region. In this paper,the change of the spectral transmittance from room temperature to600℃ was studied for the zinc sulfide materials prepared by chemical vapor deposition（ CVD） and hot pressing（ HP）. Based on the two-dimensional correlation spectrum analysis technique,the interaction of the phonons in the long wave absorption region was obtained. In the long wave absorption band from 700 cm^-1 to 1 250 cm^-1,the phonon frequencies of CVD Zn S is the third harmonic frequencies in the transverse vibration mode（ TO） and the third harmonic frequency in the longitudinal acoustic mode（ LA）. The phonon frequencies of HP Zn S are 3 TO,3 LA and 4 LA,and the response under temperature is 3 LA,3 TO and 4 LA in proper order. The vibration absorption of Zn S impurity prepared by the two techniques has an effect on the spectral transmittance in the range from 1 250 cm-1 to 2 000 cm-1 under the action of temperature,and the increase of the transmittance in different degrees occurs. Because of the difference of impurities,the transmittance of CVD Zn S is more significant than that of HP Zn S at high temperature environment.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第5期606-611,共6页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(61405145,61235011)
天津市自然科学重点基金(15JCZDJC31900)
中国博士后科学基金(2014M560104,2015T80115)~~
