Study on the filter based on photonic crystal 1×3 cavity
Received:March 01, 2018  Revised:September 13, 2018  download
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Author NameAffiliationE-mail
WU Li-Heng School of Physics Science & Information Engineering ,Liaocheng University wulihenglctu@163.com 
WANG Ming-Hong School of Physics Science & Information Engineering ,Liaocheng University wangminghong@lcu.edu.cn 
Abstract:Abstract: In consideration of the phase difference between the reflected electromagnetic wave and incident electromagnetic wave in the input waveguide of the filter, operational performances for different design conditions are analyzed by the CMT (Coupled Mode Theory), then the filter structure based on photonic crystal 1×3 cavity is optimized. The characteristics of the filter are studied by using the FDTD method. Average peak wavelength normalized transmission of the 96 pass-bands obtained by adjusting locations of the tuning rods below 1×3 cavity is up to 89.6%. Average spacing between adjacent peak wavelengths is 1.25nm. Average band width of the filter and average quality factor of the cavity are 1.19 nm and 1350.2, repectively. Tunable ranges of dropping peak wavelengthes are between 1534.04 nm and 1653.16 nm. The results show that the filer has the characteristics of high normalized transmission, narrow band width, stable wavelength signal dropping intensity etc. This structure has potential value in the designs of DWDDM (Dense Wavelength Division Demultiplexing) systems, optical sensing devices, dense optical path integration etc.
keywords:photonic crystal 1×  3 cavity  phase difference  FDTD method  CMT  CWDDM  filter
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Copyright:《Journal of Infrared And Millimeter Waves》