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Updated: Jun 4, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Continuous-wave organic laser enabled by monolayer molecular crystal.

Lan Zhang1, Boxiang Zhao1, Tao Wang2

  • 1State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, PR China.

Nature Communications
|June 2, 2026
PubMed
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Researchers achieved continuous-wave (CW) organic lasing at room temperature using monolayer organic molecular crystals. This breakthrough overcomes triplet exciton and thermal degradation issues, enabling practical organic laser applications.

Area of Science:

  • Organic electronics
  • Solid-state physics
  • Materials science

Background:

  • Organic lasers offer flexibility and tunable wavelengths for applications like wearable devices and displays.
  • Continuous-wave (CW) operation in solid-state organic lasers is hindered by triplet exciton accumulation and material degradation.
  • Existing challenges limit the practical use of organic lasers in continuous operation modes.

Purpose of the Study:

  • To achieve room-temperature continuous-wave (CW) lasing in solid-state organic lasers.
  • To overcome nonradiative losses from triplet excitons and photo-thermal degradation.
  • To enable practical applications of organic lasers through stable CW operation.

Main Methods:

  • Utilized a monolayer organic molecular crystal (MOMC) as the gain medium.

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  • Engineered J-aggregate configurations within the MOMC to promote super-radiant emission.
  • Encapsulated the MOMC within a hexagonal boron nitride (hBN) microdisk for optical resonance and thermal management.

    • Main Results:

    • Demonstrated room-temperature CW organic lasing.
    • Observed suppressed triplet exciton accumulation due to ultrashort radiative lifetimes outcompeting intersystem crossing (ISC).
    • Achieved enhanced thermal stability and optical confinement using the hBN microdisk resonator.
    • Characterized the CW lasing with reduced linewidth, threshold behavior, linear polarization, and coherence.

    Conclusions:

    • Successfully achieved stable room-temperature CW organic lasing, addressing a major challenge in organic semiconductor research.
    • The J-aggregate configuration and hBN encapsulation effectively mitigate triplet excitons and thermal degradation.
    • This work paves the way for the development and practical application of advanced organic laser technologies.