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Large mode splitting and lasing in optimally coupled photonic-crystal microcavities
Kirill A Atlasov1, Alok Rudra, Benjamin Dwir
1Ecole Polytechnique Fédérale de Lausanne, Laboratory of Physics of Nanostructures CH-1015 Lausanne, Switzerland. kirill.atlasov@a3.epfl.ch
Optics Express
|March 4, 2011
Summary
Researchers coupled L-type photonic-crystal cavities to achieve large mode splitting, enabling reproducible coupling and a novel microlaser. This breakthrough offers potential for advanced optical switching and modulation applications.
Area of Science:
- Photonics and optical engineering
- Materials science and nanotechnology
Background:
- Photonic-crystal (PhC) cavities are crucial for optical devices, but disorder-induced detuning limits reproducible coupling.
- Achieving large mode splitting in coupled PhC cavities is essential for enhanced functionality.
Purpose of the Study:
- To exploit L-type photonic-crystal cavities for large mode splitting.
- To demonstrate reproducible coupling by overcoming disorder-induced detuning.
- To develop a microlaser utilizing optimally coupled PhC cavities with quantum wire gain medium.
Main Methods:
- Coupling of L-type photonic-crystal cavities following inherent field distribution.
- Utilizing quantum wire gain medium for microlaser fabrication.
Main Results:
- Achieved large mode splitting of approximately 10-20 nm (~15-30 meV) near 1 µm wavelength.
- Demonstrated reproducible coupling significantly exceeding conventional PhC technology limitations.
- Successfully demonstrated a microlaser based on optimally coupled PhC cavities.
Conclusions:
- Optimally coupled L-type PhC cavities enable large, reproducible mode splitting.
- The developed microlaser shows promise for applications in fast optical switching and modulation.
