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Chin. Phys. B, 2008, Vol. 17(1): 228-231    DOI: 10.1088/1674-1056/17/1/040
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

A ministop band in a single-defect photonic crystal waveguide based on silicon on insulator

Tang Hai-Xia(唐海侠), Zuo Yu-Hua(左玉华), Yu Jin-Zhong(余金中), and Wang Qi-Ming(王启明)
State Key Joint Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Abstract  This paper reports that a two-dimensional single-defect photonic crystal waveguide in the $\varGamma$-$K$ direction with triangular lattice on a silicon-on-insulator substrate is fabricated by the combination of electron beam lithography and inductively coupled plasma etching. A ministop band (MSB) is observed by the measurement of transmission characteristics. It results from the coupling between the two modes with the same symmetry, which is analysed from the stimulated band diagram by the effective index and the two-dimensional plane wave expansion methods. The parameter working on the MSB is the ratio of the radius of air holes to the lattice constant, $r/a$. It is obtained that the critical $r/a$ value determining the occurrence or disappearance of MSB is 0.36. When $r/a $ is larger than or equal to 0.36, the MSB occurs. However, when $r/a $ is smaller than 0.36, the MSB disappears.
Keywords:  photonic bandgap      photonic crystal waveguide      silicon-on-insulator      ministop band  
Accepted manuscript online: 
PACS:  42.70.Qs (Photonic bandgap materials)  
  42.79.Gn (Optical waveguides and couplers)  
  42.82.Cr (Fabrication techniques; lithography, pattern transfer)  
  52.77.Bn (Etching and cleaning)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 60336010 and 60537010).

Cite this article: 

Tang Hai-Xia(唐海侠), Zuo Yu-Hua(左玉华), Yu Jin-Zhong(余金中), and Wang Qi-Ming(王启明) A ministop band in a single-defect photonic crystal waveguide based on silicon on insulator 2008 Chin. Phys. B 17 228

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