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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
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Summary
Finite photonic crystals act as mirrorless resonant cavities, supporting unique surface-avoiding states near allowed bands. These findings offer new insights into light confinement in defect-free photonic structures.
Area of Science:
- Photonics
- Condensed Matter Physics
- Electromagnetism
Background:
- Defects in infinite photonic crystals are known to host localized resonant modes within forbidden bands.
- Understanding light-matter interactions in finite structures is crucial for optical device design.
Purpose of the Study:
- To investigate the resonant behavior of finite, defect-free photonic crystals.
- To demonstrate their function as mirrorless resonant cavities for specific frequency ranges.
Main Methods:
- Theoretical analysis of electromagnetic wave propagation in finite photonic crystals.
- Characterization of resonant modes, including their spatial extent and frequency dependence.
Main Results:
- Finite, defect-free photonic crystals exhibit mirrorless resonant cavity behavior near allowed band edges.
- Resonant modes are extended, surface-avoiding states, existing independently of crystal shape.
- Quality factors and finesses scale with crystal size (L) and wavelength (λ) as (L/λ)³ and L/λ, respectively.
Conclusions:
- Finite photonic crystals can serve as efficient resonant cavities without requiring mirrors.
- The observed topological modes share similarities with those in Fabry-Pérot resonators and plasmonic systems.
- These findings open avenues for novel optical components and light manipulation strategies.
