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Related Experiment Video

Updated: Jun 22, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Room temperature continuous wave lasing in InAs quantum-dot microdisks with air cladding.

Toshihide Ide, Toshihiko Baba, Jun Tatebayashi

    Optics Express
    |June 5, 2009
    PubMed
    Summary

    Researchers achieved room temperature continuous wave lasing in indium arsenide (InAs) quantum-dot microdisk lasers. This breakthrough, enabled by an improved disk shape, resulted in a low threshold pump power and a single lasing peak at 1280 nm.

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    Area of Science:

    • Semiconductor physics
    • Optoelectronics
    • Nanotechnology

    Background:

    • Quantum dot lasers offer potential for compact and efficient light sources.
    • Achieving continuous wave (CW) lasing at room temperature remains a challenge for many quantum dot laser designs.
    • Microdisk resonators provide high optical confinement, crucial for low-threshold lasing.

    Purpose of the Study:

    • To demonstrate room temperature continuous wave (CW) lasing in indium arsenide (InAs) quantum-dot microdisk lasers.
    • To investigate the impact of an improved disk shape on laser performance.
    • To characterize the lasing properties, including threshold power and emission wavelength.

    Main Methods:

    • Fabrication of InAs quantum-dot microdisk lasers using a standard air-cladding optical confinement structure.

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    Last Updated: Jun 22, 2026

    Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
    12:57

    Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

    Published on: October 13, 2017

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
    11:21

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

    Published on: March 30, 2017

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    09:49

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  • Characterization of lasing performance under optical pumping at room temperature.
  • Spectral analysis to identify lasing peaks and threshold pump power determination.

    • Main Results:

    • Successful demonstration of the first room temperature CW lasing in InAs quantum-dot microdisk lasers.
    • Observed a single strong lasing peak at a wavelength of 1280 nm.
    • Achieved a threshold pump power of 410 μW, with an effective threshold of 81 μW after considering absorption efficiency.

    Conclusions:

    • The improved disk shape significantly enhanced the Q factor, leading to low-threshold room temperature CW lasing.
    • These results highlight the potential of InAs quantum dots in microdisk structures for practical optoelectronic applications.
    • Further optimization of disk geometry could lead to even more efficient and lower-threshold laser devices.