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首页> 外文期刊>Applied optics >Modeling of the frequency- and temperature-dependent absorption coefficient of long-wave-infrared (2-25 (mu)m) transmitting materials
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Modeling of the frequency- and temperature-dependent absorption coefficient of long-wave-infrared (2-25 (mu)m) transmitting materials

机译：长波红外（2-25μm）传输材料的频率和温度相关的吸收系数建模

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摘要

A semiempirical multiphonon model based on quantum-mechanical oscillators under a Morse potential is applied to the absorption coefficient of far-infrared transmitting materials. Known material properties are combined with absorption coefficient data to fit the empirical parameters of the model. This provides an accurate means of predicting the intrinsic absorption of the materials in their multiphonon regions. Extinction data are obtained by measuring material transmittances with a Fourier-transform spectrometer and comparing them with the lossless transmittances predicted by Sellmeier models. Where appropriate, scatter models are used to separate the extinction into loss due to scatter and absorption. Data and model parameters are presented for GaAs, GaP, ZnS, and ZnSe.
机译：将基于摩尔斯电势下的量子力学振荡器的半经验多声子模型应用于远红外传输材料的吸收系数。已知的材料属性与吸收系数数据相结合，以拟合模型的经验参数。这提供了预测材料在其多声子区域中的固有吸收的准确方法。消光数据是通过使用傅立叶变换光谱仪测量材料的透射率并将其与Sellmeier模型预测的无损透射率进行比较而获得的。在适当的情况下，使用散射模型将消光分为由于散射和吸收而造成的损失。给出了GaAs，GaP，ZnS和ZnSe的数据和模型参数。

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