玻璃因具備良好的採光及美觀性，已被廣泛運用於現代建築中，但缺點在於允許紅外線熱輻射進入室內，造成室內空調用電負擔，故具有節能效果的玻璃便因應而生。而開發節能玻璃的理想目標之一，在於兼顧透光、美觀性的同時，還能降低無用的熱輻射進入室內，除此目標外，亦包括阻絕紫外線穿透以避免傷害人體、降低可見光反射以減少對建築物外圍環境之光害、提升可見光穿透率以減少室內照明耗能等，以達到節能效果。現有節能玻璃常利用縱向堆疊多層薄膜，利用干涉原理實現波長選擇輻射性質，而本研究相對於現有節能玻璃另闢蹊徑，利用鑲嵌矩形次波長二維週期光柵結構開發節能玻璃，以嚴格耦合波理論來分析光柵之輻射性質，並結合基因演算法來最佳化光柵結構尺寸，以實現節能玻璃理想波長選擇之光學性質。在獲得最佳化結構之後，本文將討論其結構在微奈米製程上之尺寸容忍度，並針對其頻譜上的特殊輻射性質討論，呈現其電場與結構之交互作用。

Modern architecture favors buildings with large ratios of glazing to floor areas. This, in combination with the increased use of air-conditioning is a significant portion of the total primary energy consumption of buildings. Building energy efficiency can be improved by coating low-e films on the window which called energy-saving window. This window provides natural light transmission as well as blocks infrared rays to achieve energy efficient design. This study is going to develop the energy-saving glass with an alternative but compatible way, the utilization of sub-wavelength periodic structures, which is different from coating thin films. Those structures are embedded in glass or the other way around to realize wavelength-selective optical properties which is numerically optimized with the rigorous coupled-wave analysis (RCWA) method and the genetic algorithm (GA). After optimization, we discuss the dimension tolerance of micro/nano fabrication process and investigate the physical mechanisms such as surface plasmon polariton, Rayleigh anomaly, etc. resulting unique optical properties by obtaining the interplay between structures and electromagnetic fields.

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