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Topological photonic crystal nanowire array laser with bulk states
Optics Express
|June 11, 2024
Summary
This study introduces a novel topological photonic crystal laser. Optimized designs achieve superior performance, including higher output and lower threshold, paving the way for advanced nanolasers.
Area of Science:
- Photonics
- Materials Science
- Condensed Matter Physics
Background:
- Topological photonic crystals offer unique light manipulation properties.
- Indium Gallium Arsenide Phosphide/Indium Phosphide (InGaAsP/InP) core-shell nanowires are promising for laser applications.
- Operating in the 1550 nm band is crucial for telecommunications.
Purpose of the Study:
- To propose and simulate a topological photonic crystal laser based on InGaAsP/InP core-shell nanowires.
- To optimize structural parameters for enhanced laser performance.
- To investigate the impact of topological protection on laser characteristics.
Main Methods:
- Numerical simulation of a core-shell nanowire array laser structure.
- Optimization of structural parameters, including nanowire slit width.
- Analysis of key performance metrics such as Q factor, side-mode suppression ratio, threshold, output power, and beam divergence.
Main Results:
- Achieved a high Q factor of 1.2 × 105 and a side-mode suppression ratio of 13.2 dB.
- Demonstrated a 17% lower threshold and 613% higher maximum output compared to uniform nanowire arrays.
- Obtained a low beam divergence angle of 2° due to topological protection.
Conclusions:
- The proposed topological photonic crystal laser exhibits significantly improved performance over conventional designs.
- Topological protection enhances laser stability and reduces beam divergence.
- This work advances the development of high-performance nanolasers for various applications.
