Narrow Band Filter at 1550 nm Based on Quasi-One-Dimensional Photonic Crystal with a Mirror-Symmetric Heterostructure
Fang Wang,
Yong Zhi Cheng,
Xian Wang,
Yi Nan Zhang,
Yan Nie,
Rong Zhou Gong
Affiliations
Fang Wang
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Yong Zhi Cheng
Engineering Research Center for Metallurgical Automation and Detecting Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
Xian Wang
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Yi Nan Zhang
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Yan Nie
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Rong Zhou Gong
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
In this paper, we present a high-efficiency narrow band filter (NBF) based on quasi-one-dimensional photonic crystal (PC) with a mirror symmetric heterostructure. Similarly to the Fabry-Perot-like resonance cavity, the alternately-arranged dielectric layers on both sides act as the high reflectance and the junction layers used as the defect mode of the quasi-one-dimensional PC, which can be designed as a NBF. The critical conditions for the narrow pass band with high transmittance are demonstrated and analyzed by simulation and experiment. The simulation results indicate that the transmission peak of the quasi-one-dimensional PC-based NBF is up to 95.99% at the telecommunication wavelength of 1550 nm, which agrees well with the experiment. Furthermore, the influences of the periodicity and thickness of dielectric layers on the transmission properties of the PC-based NBF also have been studied numerically. Due to its favorable properties of PC-based NBF, it is can be found to have many potential applications, such as detection, sensing, and communication.
