Anous Noha, Abdallah Mohamed, Ramadan Tarek, Qaraqe Khalid, Khalil Diaa
Appl Opt. 2017 Feb 1;56(4):C106-C116. doi: 10.1364/AO.56.00C106.
This work presents what we believe is a novel design of a hybrid plasmonic-transmission blue filter for visible light communication systems that employ yellow phosphor-coated blue light-emitting diodes. The proposed filter balances the trade-off between transmission performance and tolerance to variation in angles of incidence (AOIs) while maintaining a low cost with limited complexity design. The designed filter operation is based upon quasi-plasmon mode excitation in a hybrid structure of alternating layers of silver and titanium dioxide over a silica substrate. A primary design approach for a hybrid plasmonic filter of five alternating layers is illustrated in detail. Needle optimization technique is further applied to achieve the required filter performance. The designed filter has an insertion loss of ∼1 dB over a spectral range of 400-485 nm and a minimal close to zero polarization-dependent loss for a wide range of AOI (slightly above 50°). The tolerance of the proposed design against fabrication errors is also tested. The performances of the proposed filters are tested for individual and simultaneous variations from the designed thicknesses, with a ±10% standard deviation from each layer's thickness.
这项工作展示了我们认为的一种新型混合等离子体传输蓝色滤光片的设计，该滤光片用于采用涂有黄色荧光粉的蓝色发光二极管的可见光通信系统。所提出的滤光片在传输性能与入射角（AOI）变化容差之间取得平衡，同时通过有限复杂度的设计保持低成本。所设计的滤光片基于在二氧化硅衬底上交替堆叠银层和二氧化钛层的混合结构中的准等离子体模式激发。详细说明了一种五层交替的混合等离子体滤光片的主要设计方法。进一步应用针优化技术来实现所需的滤光片性能。所设计的滤光片在400 - 485 nm光谱范围内的插入损耗约为1 dB，并且在宽入射角范围（略高于50°）内具有接近零的最小偏振相关损耗。还测试了所提出设计对制造误差的容差。针对所设计厚度的个体和同时变化测试了所提出滤光片的性能，各层厚度的标准偏差为±10%。
