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Updated: Jul 6, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Vertical surface emitting open coupled-cavities based on photonic crystal surface modes.
1State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
Applied Optics
|April 12, 2008
Summary
Researchers developed novel photonic crystal cavities for efficient vertical light emission. The back-to-back design achieves zero divergence and high quality factors, creating ideal directional light sources.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Photonic crystal cavities are crucial for controlling light emission.
- Achieving high-quality, vertically emitted light with zero divergence is challenging.
- Existing designs often struggle with efficiency and beam quality.
Purpose of the Study:
- To investigate two types of vertical surface emitting photonic crystal cavities.
- To explore designs based on beaming mechanisms and coupled surface modes.
- To optimize cavity configurations for high-quality vertical emission.
Main Methods:
- Studied photonic crystal cavities utilizing beaming mechanisms.
- Analyzed coupled surface modes for vertical emission.
- Investigated resonant properties and coupling efficiency.
- Optimized cavity designs through theoretical analysis and simulation.
Main Results:
- Demonstrated vertical emission with a zero divergence angle.
- Achieved high quality factors through a back-to-back cavity design.
- Transformed nonradiative surface modes into radiative surface modes via periodic modulation.
- Showcased constructive interference for enhanced vertical emission and beam quality.
Conclusions:
- The back-to-back cavity design facilitates easy achievement of zero divergence and high quality factors.
- Periodic surface modulation is key to converting nonradiative to radiative modes for vertical emission.
- Open coupled-cavities are promising for highly directional light sources.
- Optimal cavity configurations enhance resonant properties and coupling efficiency.
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