Chin. Phys. Lett.  2005, Vol. 22 Issue (12): 3094-3096    DOI:
Original Articles |
Reduction of Refractive Index Contrast Threshold for Photonic Band-Gap in Square Lattices
WANG Jian-Feng;HUANG Yi-Dong;ZHANG Wei;PENG Jiang-De
Department of Electronics Engineering, Tsinghua University, Beijing 100084
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WANG Jian-Feng, HUANG Yi-Dong, ZHANG Wei et al  2005 Chin. Phys. Lett. 22 3094-3096
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Abstract The threshold of refractive index contrast (RIC) to open a photonic band gap can be reduced by symmetry breaking. For the case of square lattice composed by dielectric cylinders, the absolute band gap is demonstrated by inserting small rods in the centre of the lattices, and the threshold RIC is reduced to 3.8. As for the square lattices composed by air holes in dielectric, the minimal RIC required for an absolute band gap decreases to 2.20.
Keywords: 42.70.Qs      78.20.Bh     
Published: 01 December 2005
PACS:  42.70.Qs (Photonic bandgap materials)  
  78.20.Bh (Theory, models, and numerical simulation)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2005/V22/I12/03094
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WANG Jian-Feng
HUANG Yi-Dong
ZHANG Wei
PENG Jiang-De
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