Plasmonic Fraunhofer-wavelength narrow-band filter based on calcium film |
| |
Authors: | Hai Lu Ju-Bao Yang Jing-Jing Guo Hao-Xing Zhang Yu-Feng Peng |
| |
Affiliation: | 1. College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, China;2. Key Laboratory of Advanced Micro-structure Materials, Ministry of Education, Tongji University, Shanghai 200092, China |
| |
Abstract: | We theoretically investigate plasmonic properties of a calcium film in a Kretschmann excitation scheme. Based on surface plasmon polaritons, the absorbance of the calcium film can be as high as 100% for the p-polarization, much higher than the absorbance for the s-polarization at the wavelength of 422.7 nm, correspondingly to the g Fraunhofer line. The 45 nm thick film of calcium has a high reflectance of about 76% at 422.7 nm for s-polarization. But for p-polarization, there is a minimum in the reflectivity curves at the angle of 19°. The narrow-band filter based on calcium film is particularly suited for working with conventional calcium atomic filter and on-chip integration due to its solid-state bulky feature. Furthermore, the plasmonic filter based on the calcium film is described that may offers new applications in angle- and polarization-sensitive sensor and the detection of weak laser light. |
| |
Keywords: | Surface plasmon polariton Atomic filter Fraunhofer line |
本文献已被 ScienceDirect 等数据库收录! |
|