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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Directional emission from photonic crystal waveguides
Optics Express
|June 9, 2009
Summary
We designed a novel photonic crystal waveguide that directs light emission with low divergence. This new design, utilizing defects, works for both dielectric rod and air hole photonic crystals.
Area of Science:
- Photonics and optical engineering
- Condensed matter physics
Background:
- Photonic crystal waveguides are crucial for controlling light propagation.
- Achieving directional light emission from waveguides is a key challenge in integrated optics.
Purpose of the Study:
- To propose and analyze a novel photonic crystal waveguide design for directional light emission.
- To investigate the underlying optical field distribution responsible for the emission characteristics.
Main Methods:
- Numerical simulations of photonic crystal waveguide structures with termination defects.
- Analysis of optical field distribution at the waveguide exit.
- Verification across different photonic crystal fabrication methods (dielectric rods and air holes).
Main Results:
- The proposed design with termination defects successfully provokes directional light emission.
- The optical field distribution at the waveguide exit mimics a triple point source.
- Low angular divergence of emitted light was observed.
- The phenomenon is consistent in both dielectric rod and air hole photonic crystal structures.
Conclusions:
- The novel photonic crystal waveguide design effectively achieves directional emission with low angular divergence.
- The triple point source-like field distribution is key to the observed low divergence.
- This design offers a promising approach for advanced photonic devices requiring controlled light output.
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