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Color-tunable organic microcavity laser array using distributed feedback.

Giuseppe Strangi1, Valentin Barna, Roberto Caputo

  • 1LICRYL-INFM and Center of Excellence CEMIF.CAL, Department of Physics, University of Calabria, I-87036 Rende (CS), Italy. Strangi@fis.unical.it

Physical Review Letters
|March 24, 2005
PubMed
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Researchers developed phase-locked organic microlasers using dye-doped liquid crystals in microchannels. These tunable microlasers offer high cavity quality, low thresholds, and wavelength control for photonic chip applications.

Area of Science:

  • Photonics
  • Materials Science
  • Optoelectronics

Background:

  • Distributed feedback microstructures are crucial for light confinement and lasing.
  • Organic materials offer tunable optical properties for advanced photonic devices.

Purpose of the Study:

  • To present an innovative array of intrinsically phase-locked, color-tunable organic microlasers.
  • To explore the potential of engineered heterostructures for enhanced laser performance.

Main Methods:

  • Embedding dye-doped helical liquid crystals within periodic, light-sculptured polymeric microchannels.
  • Utilizing a single-step fabrication process for microchannel structuring.
  • Orienting the helical superstructure along the microchannels for directional lasing.

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Main Results:

  • Observed lasing along the microchannel direction at the red edge of the stop band.
  • Demonstrated a high quality factor cavity and an ultralow lasing threshold.
  • Showcased thermal and electric control over lasing wavelength and emission intensity.

Conclusions:

  • The engineered heterostructure offers significant physical and technological advantages.
  • This integration of guest-host systems in patterned structures paves the way for novel photonic chip architectures.