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本文在考虑表面和体内共同吸收的情况下,用一维热扩散模型推出了悬空型、半透明面电极热电探测器响应率(?)的表达式,并计算了TGS热电探测器的?和NEP的数值。本文指出: (1)悬空型、半透明面电极热电探测器具有最佳响应率厚度,对较高工作频率,器件还具有最佳NEP厚度。两种最佳厚度可根据本文导出的响应率公式和已知的噪声公式计算出来。(2)在某些波段,如果能把材料的吸收系数提高到5×10~4cm~(-1)以上,就可研制性能优良的半透明面电极薄膜器件。
In this paper, the expression of the response rate (?) Of the pyramidal and translucent surface electrode pyroelectric detector is deduced by the one-dimensional thermal diffusivity model considering the co-absorption between the surface and the body. The value of. This paper points out: (1) The dangling type and translucent surface thermoelectric detector has the best response thickness, and for the higher operating frequency, the device also has the best NEP thickness. The two optimal thicknesses can be calculated from the response rate equations and the known noise equations derived here. (2) In some wavebands, if the absorption coefficient of the material can be increased to more than 5 × 10 ~ 4cm -1, the semipermeable surface electrode thin film device with excellent performance can be developed.