Conditions of single guided mode in two-dimensional triangular photonic crystal slab waveguides
2000; American Institute of Physics; Volume: 88; Issue: 9 Linguagem: Inglês
10.1063/1.1314300
ISSN1520-8850
AutoresHan‐Youl Ryu, Jeong-Ki Hwang, Jeong Yong Lee,
Tópico(s)Optical Coatings and Gratings
ResumoPhotonic band structure analyses are applied to study the effect of slab thickness in two-dimensional photonic crystal slab waveguides. For transverse electric-like modes of a triangular lattice of air holes, the band gap of the asymmetric photonic crystal slab with a drilled low-index cladding do not differ significantly from that of the photonic crystal suspended in air over a wide range of slab thickness. The condition of single guided mode operation is also studied and it is found that the single mode cutoff thickness changes only by a small amount as an air-hole filling ratio varies once the center of the band gap is fixed.
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