PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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A tunable dual-narrowband band-pass filter using plasma quantum well structure |
Dai Yi (戴燚)a, Liu Shao-Bin (刘少斌)a, Wang Shen-Yun (王身云)b, Kong Xiang-Kun (孔祥鲲)a b, Chen Chen (陈忱)a |
a College of Electronic and Information Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China; b College of Electronic and Information Egineering, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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Abstract A tunable dual-narrowband pass-band filter is designed. A one-dimensional photonic crystal (1D PC) is comprised of alternate dielectric layer and vacuum layer. Two quantum wells (QWs) as defects can be constructed by sandwiching two plasma slabs symmetrically in the 1D PC, and a dual-narrowband pass-band filter is formed. The conventional finite-difference time-domain (FDTD) method and piecewise linear current density recursive convolution (PLCDRC)-FDTD method are applied to the dielectric and plasma, respectively. The simulation results illustrate that the dual-narrowband frequencies can be tuned by changing the plasma frequency. The pass band interval and the half-power bandwidths (-3-dB band widths) are related to the space interval between two QWs.
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Received: 01 October 2013
Revised: 20 January 2014
Accepted manuscript online:
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PACS:
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52.40.Db
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(Electromagnetic (nonlaser) radiation interactions with plasma)
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Fund: Project supported by the Aviation Science Foundation (Key Project 20121852030), Jiangsu Provincial Natural Science Foundation, China (Grant No. BK2011727), and the Open Research Program in Jiangsu Provincial Key Laboratory of Meteorological Observation and Information Processing, China (Grant No. KDXS1207). |
Corresponding Authors:
Dai Yi, Liu Shao-Bin
E-mail: daiyi@nuaa.edu.cn;lsb@nuaa.edu.cn
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Cite this article:
Dai Yi (戴燚), Liu Shao-Bin (刘少斌), Wang Shen-Yun (王身云), Kong Xiang-Kun (孔祥鲲), Chen Chen (陈忱) A tunable dual-narrowband band-pass filter using plasma quantum well structure 2014 Chin. Phys. B 23 065202
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