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Updated: Jun 13, 2026
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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
One-dimensional parabolic-beam photonic crystal laser
Byeong-Hyeon Ahn1, Ju-Hyung Kang, Myung-Ki Kim
1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
Optics Express
|April 15, 2010
Summary
We developed novel one-dimensional parabolic-beam photonic crystal (PhC) lasers by tapering the waveguide width. These lasers efficiently confine light in a Gaussian-shaped photonic well, enabling effective light-gain overlap for enhanced performance.
Area of Science:
- Photonics
- Laser Physics
- Materials Science
Background:
- Photonic crystals (PhCs) offer unique light-manipulating properties.
- Tapered waveguides are crucial for controlling light confinement and emission.
- Efficient light-gain overlap is essential for laser performance.
Purpose of the Study:
- To investigate the properties of one-dimensional parabolic-beam photonic crystal (PhC) lasers.
- To explore the formation of photonic wells and resonant modes in tapered PhC waveguides.
- To analyze the relationship between structural perturbations and far-field radiation patterns.
Main Methods:
- Fabrication of 1-D parabolic-beam PhC lasers with parabolically tapered waveguide widths.
- Characterization of high-Q resonant modes in the tapered region.
- Analysis of the overlap between resonant modes and the gain medium.
- Investigation of far-field radiation profiles based on structural symmetry.
Main Results:
- Confirmation of a few high-Q resonant modes in the vicinity of the tapered region.
- Formation of a Gaussian-shaped photonic well due to parabolic tapering.
- Efficient overlap between dielectric PhC guided modes and the gain medium.
- Demonstration of the correlation between structural perturbation symmetry and far-field radiation.
Conclusions:
- Parabolic tapering of PhC slab waveguides enables the formation of effective photonic wells.
- High-Q resonant modes within these wells facilitate efficient light-gain interaction.
- The far-field emission characteristics are controllable via structural design and symmetry.
