本文設計一維單式週期性奈米結構作為波長選擇性吸收器，可應用於人體熱輻射吸收，目標為使其在波長10 μm處有高吸收率，其他波長則有低吸收率，為達成此效果，利用電感電容模型來設計結構尺寸的大小，使其在目標波長激發磁場共振子(Magnetic Polariton, MP)，造成高吸收率，最後以嚴格耦合波理論(Rigorous Coupled-Wave Analysis, RCWA)為基礎之程式，運算輻射性質與繪製電磁場圖作為驗證。結果顯示所開發出之最佳結構，在TM偏振光入射時，於波長9.8 ~ 10.2 μm處具有0.8以上之吸收率，且在斜向入射  = 30、45 下，吸收峰值之波長的變動幅度在5 % 以內，本文成功證明，使用LC電路模型可有效且快速地找到適合使用的結構尺寸在特定波長增加吸收率，可避免一般搜尋與最佳化過程所需耗費的時間。

Wavelength-selective absorbers for sensing human thermal radiation were numerically developed with a SiO2 spacer sandwiched between a gold substrate and gratings. All dimensions were determined with an LC (inductor-capacitor) circuit model which could induce MP (magnetic polariton) excitation at the target wavelength. Although the maximum absorptance is higher than 0.8 when the incident wavelength is near 10 μm, the absorptance is close to 0 in other wavelengths. Absorptance spectra and electromagnetic fields were acquired from programmed codes based on RCWA (rigorous coupled-wave analysis). This thesis demonstrates that the LC circuit model can be used to obtain suitable structure parameters and save time as compared to other optimized methods.

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