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Related Experiment Video

Updated: Apr 23, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Ultracompact low-threshold organic laser.

Parag B Deotare1, Thomas S Mahony, Vladimir Bulović

  • 1Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.

ACS Nano
|September 23, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed a compact organic laser with a low threshold using a photonic crystal nanobeam cavity. This ultracompact laser shows potential for integrated photonic applications.

Keywords:
Alq3:DCMnanobeam cavitiesnanolasersorganic laser dyephotonic crystal

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Area of Science:

  • Organic electronics
  • Photonics
  • Nanotechnology

Background:

  • Organic thin films offer tunable optical properties for laser applications.
  • Photonic crystal cavities enhance light-matter interactions for efficient lasing.

Purpose of the Study:

  • To demonstrate an ultracompact, low-threshold organic laser.
  • To investigate the performance of a photonic crystal nanobeam cavity with an organic gain medium.

Main Methods:

  • Fabrication of a photonic crystal nanobeam cavity.
  • Integration of an Alq3:DCM host:guest molecular organic thin film as the gain layer.
  • Optical pumping using femtosecond laser pulses at 400 nm wavelength.

Main Results:

  • Achieved lasing with a low threshold of 4.2 μJ/cm(2).
  • Observed high quality factor to mode volume (Q/V) ratio and enhanced spontaneous emission.
  • Modeled laser dynamics showing good agreement with experimental data.

Conclusions:

  • The developed organic laser is ultracompact and exhibits a low lasing threshold.
  • The device's waveguide geometry facilitates on-chip integration.
  • Potential applications include biochemical sensing, inertial sensors, and data communication.