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Chin. Phys. B, 2014, Vol. 23(4): 044207    DOI: 10.1088/1674-1056/23/4/044207
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Extreme narrow photonic passbands generated from defective two-segment-connected triangular waveguide networks

Tang Zhen-Xinga, Yang Xiang-Boa b, Lu Jiana, Liu Timon Cheng-Yib
a MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China;
b School of Physical Education and Sports Science, South China Normal University, Guangzhou 510006, China
Abstract  In this paper, we investigate the optical transmission properties of perfect and defective two-segment-connected triangular waveguide networks (2SCTWNs) and find that after introducing defects in networks, many groups of transparent extreme narrow photonic passbands (ENPPs) will be created in the middle of the transmission spectra, the number for each group and the group number of ENPPs can be adjusted by the matching ratios of waveguide length (MRWLs), the number of defects, and the number of unit cells of 2SCTWNs. The influences of MRWL, number of defects, and number of unit cells on the number, width, and position of these ENPPs are researched and a series of quantitative rules and properties are obtained. It may be useful for the designing of high-sensitive optical switches, wavelength division multiplexers, extreme-narrowband filters, and other correlative waveguide network devices.
Keywords:  photonic band gap      defective waveguide network      narrow passband  
Received:  17 July 2013      Revised:  22 September 2013      Accepted manuscript online: 
PACS:  42.70.Qs (Photonic bandgap materials)  
  41.20.Jb (Electromagnetic wave propagation; radiowave propagation)  
  61.72.Bb (Theories and models of crystal defects)  
Fund: Project supported by the National Natural Science Foundations of China (Grant Nos. 11374107 and 10974061).
Corresponding Authors:  Yang Xiang-Bo     E-mail:  xbyang@scnu.edu.cn
About author:  42.70.Qs; 41.20.Jb; 61.72.Bb

Cite this article: 

Tang Zhen-Xing, Yang Xiang-Bo, Lu Jian, Liu Timon Cheng-Yi Extreme narrow photonic passbands generated from defective two-segment-connected triangular waveguide networks 2014 Chin. Phys. B 23 044207

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