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Open AccessArticle

Narrow Band Filter at 1550 nm Based on Quasi-One-Dimensional Photonic Crystal with a Mirror-Symmetric Heterostructure

1
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
2
Engineering Research Center for Metallurgical Automation and Detecting Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(7), 1099; https://doi.org/10.3390/ma11071099
Received: 7 May 2018 / Revised: 21 June 2018 / Accepted: 25 June 2018 / Published: 27 June 2018
(This article belongs to the Section Structure Analysis and Characterization)
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. View Full-Text
Keywords: narrow band filter; one-dimensional photonic crystals; mirror symmetric heterostructure; telecommunication wavelength narrow band filter; one-dimensional photonic crystals; mirror symmetric heterostructure; telecommunication wavelength
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Wang, F.; Cheng, Y.Z.; Wang, X.; Zhang, Y.N.; Nie, Y.; Gong, R.Z. Narrow Band Filter at 1550 nm Based on Quasi-One-Dimensional Photonic Crystal with a Mirror-Symmetric Heterostructure. Materials 2018, 11, 1099.

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