An improved transmitting multi-layer thin-film filter

Zhang Ying^a),^b), Qi Hong-Ji^a), Yi Kui^a), Wang Yan-Zhi^a), Sui Zhan^c), Shao Jian-Da^a)†

Electric-field distribution of short and long wave-pass cutoff filter-combination device with a period number of 35 and an oblique angle of incidence of 45°: (a) before local optimization and (b) after local optimization.