Article

Donor and acceptor guided modes in photonic crystal fibers.

Optics Letters (impact factor: 3.4). 10/2000; 25(18):1328-30. pp.1328-30
Source: PubMed

ABSTRACT We present a triangular photonic-crystal-fiber structure that exhibits guided modes simultaneously above and below the first conduction band. We achieve this configuration by decreasing the size of one of the airholes (the defect) in a specific triangular lattice. More generally, we analyze the behavior of guided modes that depends on the size of the defect. Defects generated by decreasing or increasing the size of one of the holes produce donor or acceptor guided modes, respectively, in analogy with impurity levels in solid-state crystals. We conclude that the guiding mechanism for both donor and acceptor modes is produced by a unique phenomenon of multiple interference by a periodic structure.

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Keywords

acceptor
 
acceptor modes
 
airholes
 
first conduction band
 
guiding mechanism
 
holes
 
impurity levels
 
periodic structure
 
solid-state crystals
 
specific triangular lattice
 
triangular photonic-crystal-fiber structure
 
unique phenomenon