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Updated: Jun 18, 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
Photonic-crystal microcavity laser with site-controlled quantum-wire active medium
Kirill A Atlasov1, Milan Calic, Karl Fredrik Karlsson
1Ecole Polytechnique Fédérale de Lausanne, Laboratory of Physics of Nanostructures, CH-1015 Lausanne, Switzerland. kirill.atlasov@epfl.ch
Optics Express
|November 13, 2009
Summary
Researchers demonstrated a site-controlled quantum-wire laser. This device achieved single-mode lasing with a low threshold, paving the way for efficient photonic devices.
Area of Science:
- Quantum optics
- Materials science
- Nanotechnology
Background:
- Photonic crystal microcavities offer unique light-matter interaction properties.
- Quantum wires are crucial for developing advanced laser technologies.
- Achieving site-controlled lasing is essential for integrated photonic circuits.
Purpose of the Study:
- To experimentally demonstrate a site-controlled quantum-wire photonic-crystal microcavity laser.
- To characterize its lasing properties, including threshold and single-mode operation.
- To determine key performance metrics like spontaneous emission coupling coefficient.
Main Methods:
- Optical pumping of a fabricated quantum-wire photonic-crystal microcavity.
- Analysis of transient laser response and spectral linewidth narrowing.
- Measurement of non-linear power input-output characteristics.
Main Results:
- Successful demonstration of single-mode lasing in a site-controlled quantum-wire microcavity.
- Determination of a low average-power threshold of approximately 240 nW (absorbed power).
- Derivation of a high spontaneous emission coupling coefficient (beta) of approximately 0.3.
Conclusions:
- The study validates the feasibility of site-controlled quantum-wire lasers.
- The achieved low threshold and high beta indicate high potential for efficient light emission.
- This work contributes to the advancement of compact and efficient laser sources for photonic applications.
