A high performance optical sensor based on a double compound symmetric gratings(DCSGs) structure is designed. The reflection spectrum of the DCSG is investigated by utilizing a method that combines a theoretical model...A high performance optical sensor based on a double compound symmetric gratings(DCSGs) structure is designed. The reflection spectrum of the DCSG is investigated by utilizing a method that combines a theoretical model with the eigenmode information of the grating structure. The theoretical results, which are observed to agree well with those acquired by rigorous coupled-wave analysis, show that the linewidth of the reflection spectrum decreases upon the increasing distance between the grating strips. This research work will lay a foundation for studying high performance integrated optical sensors in miniature nanostructures.展开更多
基金This work was supported in part by the National Natural Science Foundation of China(Nos.61905060 and 21976049)Natural Science Foundation of Hebei Province(Nos.F2019402063 and F2019402240)Scientific Research Project of the Department of Education of Hebei Province(No.ZD2021019)。
文摘A high performance optical sensor based on a double compound symmetric gratings(DCSGs) structure is designed. The reflection spectrum of the DCSG is investigated by utilizing a method that combines a theoretical model with the eigenmode information of the grating structure. The theoretical results, which are observed to agree well with those acquired by rigorous coupled-wave analysis, show that the linewidth of the reflection spectrum decreases upon the increasing distance between the grating strips. This research work will lay a foundation for studying high performance integrated optical sensors in miniature nanostructures.