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Linear propagation characteristics of periodically segmented waveguides
Optics Letters
|October 3, 2009
Summary
Periodically segmented planar waveguides exhibit low radiation loss, similar to uniform waveguides, with potential stop bands. Theoretical analysis confirms experimental findings on radiation loss in these optical devices.
Area of Science:
- Optics and Photonics
- Waveguide Theory
- Electromagnetism
Background:
- Planar waveguides are fundamental components in integrated optics.
- Understanding radiation loss is crucial for device efficiency.
- Periodically segmented structures offer unique optical properties.
Purpose of the Study:
- To model and analyze periodically segmented planar waveguides.
- To investigate the impact of segment duty cycles on waveguide properties.
- To compare segmented waveguides with uniform waveguides.
Main Methods:
- Rigorous modal method of diffraction gratings.
- Analysis of radiation loss, effective index, and electric-field distribution.
- Parametric study varying segment duty cycles.
Main Results:
- Segmented waveguides show behavior similar to uniform waveguides.
- Low radiation loss is a key characteristic.
- Potential for stop band formation exists.
- Electric-field distribution is analyzed for different duty cycles.
Conclusions:
- Periodically segmented planar waveguides are viable optical components.
- The theoretical model accurately predicts low radiation loss.
- Segmented waveguides offer an alternative to uniform waveguides with tunable properties.
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