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Photoisomerization-controlled wavelength-tunable plasmonic lasers.

Shuang Wen1,2, Wu Zhou1,2, Zhiyuan Tian2

  • 1Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Chemical Communications (Cambridge, England)
|May 31, 2023
PubMed
Summary

Researchers developed wavelength-tunable plasmonic lasers using photoisomerization. Spiropyran derivatives in PMMA films dynamically change refractive index, enabling continuous tuning of lasing wavelengths for photonic integration.

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Area of Science:

  • Materials Science
  • Optics and Photonics
  • Nanotechnology

Background:

  • Plasmonic lasers offer potential for miniaturization and high performance.
  • Achieving wavelength tunability in plasmonic lasers remains a challenge for practical applications.

Purpose of the Study:

  • To demonstrate a novel method for achieving wavelength tunability in plasmonic lasers.
  • To engineer plasmonic lasers with dynamic and continuous wavelength control.

Main Methods:

  • Integration of spiropyran derivative-doped PMMA films with two-dimensional silver nanoparticle arrays.
  • Utilizing photoexcitation to control the transformation between spiropyran isomers, altering the host film's refractive index.
  • Observing the effect of refractive index changes on lattice plasmon resonance and lasing wavelength.

Main Results:

  • Successful demonstration of photoisomerization-controlled wavelength-tunable plasmonic lasers.
  • Achieved dynamical and continuous tuning of the lasing wavelength by modulating the refractive index.
  • Established a correlation between spiropyran isomer transformation and lattice plasmon resonance shifts.

Conclusions:

  • Photoisomerization offers a viable mechanism for dynamic wavelength tuning in plasmonic lasers.
  • The developed approach provides a new pathway for creating tunable plasmonic lasers.
  • This work advances the potential for practical photonic integration of tunable laser devices.