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Related Experiment Video

Updated: Apr 6, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Antenna coupled photonic wire lasers.

Tsung-Yu Kao, Xiaowei Cai, Alan W M Lee

    Optics Express
    |July 21, 2015
    PubMed
    Summary

    Researchers enhanced laser performance by integrating antennas, significantly boosting power extraction efficiency in terahertz (THz) photonic wire lasers. This novel approach overcomes limitations of sub-wavelength emitters for improved laser design.

    Area of Science:

    • Optoelectronics
    • Terahertz (THz) Photonics
    • Semiconductor Lasers

    Background:

    • Slope efficiency (SE) is a critical performance metric for semiconductor lasers.
    • Photonic wire lasers typically exhibit low SE due to sub-wavelength emitting facets.
    • Optimizing SE in conventional lasers involves intricate facet or modulation design.

    Purpose of the Study:

    • To develop a novel method for enhancing power extraction efficiency in photonic wire lasers.
    • To overcome the inherent low SE limitations of deep sub-wavelength emitters.
    • To explore the application of microwave engineering principles in laser design.

    Main Methods:

    • Monolithic integration of antennas with photonic wire lasers.
    • Utilizing microwave engineering techniques to increase the effective radiation area.

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  • Experimental application to terahertz (THz) frequency wire lasers, specifically Distributed Feedback (DFB) lasers.

    • Main Results:

    • Achieved the highest single-side slope efficiency (~450 mW/A) in pulsed mode for DFB lasers at 4 THz.
    • Demonstrated a ~4x increase in output power at 3 THz compared to structures without integrated antennas.
    • Significantly enhanced power extraction efficiency through increased effective radiation area.

    Conclusions:

    • Monolithically integrated antennas offer a viable solution to improve SE in photonic wire lasers.
    • The incorporation of microwave engineering techniques leads to substantial performance enhancements in THz lasers.
    • This approach demonstrates versatility and potential for broader applications in laser design.