Article

Theoretical analysis for superprisming effect of photonic crystals composed of magnetic material

Journal of Applied Physics (impact factor: 2.17). 11/2006; DOI:10.1063/1.2360385 pp.083105 - 083105-5
Source: IEEE Xplore

ABSTRACT In this work, we analyze theoretically the frequency-dependent phase index np(ω) of a guided mode in photonic crystals from the photonic band structures. The np(ω) reveals a promising possibility for fabricating a chromatic prism using photonic crystals. We then investigate the superprisming effect of a photonic-crystal prism for both guided continuous-wave TM and TE modes. In addition to dielectric intuition, the effects of magnetic permeability of a magnetic photonic crystal on the photonic band structure, the phase index, and the superprisming effect are examined. It was found that magnetic intuition could enhance the resolution of a photonic-crystal prism for dividing TE modes of various wavelengths, but reduce the resolution for dividing TM modes.

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Keywords

chromatic prism
 
continuous-wave TM
 
fabricating
 
frequency-dependent phase index n<sub>p</sub>(ω)
 
guided mode
 
magnetic photonic crystal
 
phase index
 
photonic band structure
 
photonic band structures
 
photonic crystals
 
photonic-crystal prism
 
promising possibility
 
superprisming effect
 
TE modes
 
TM modes
 
various wavelengths
 

S Y Yang