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Related Experiment Videos

Lasing droplets in a microfabricated channel.

Melikhan Tanyeri1, Richard Perron, Ian M Kennedy

  • 1Department of Physics, University of California, Davis, One Shields Avenue, Davis, California 95616, USA.

Optics Letters
|September 4, 2007
PubMed
Summary
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Researchers observed lasing from dye-doped microdroplets within a microchannel. This liquid-based laser emission shows unique spectral properties and nonlinear power dependence, paving the way for novel optical devices.

Area of Science:

  • Optics and Photonics
  • Microfluidics
  • Materials Science

Background:

  • Microdroplets can act as resonant cavities for light.
  • Previous studies explored lasing in various microcavities.
  • Integration of droplet generation and optical interrogation is challenging.

Purpose of the Study:

  • To demonstrate and characterize lasing from spherical microdroplets in a liquid medium.
  • To investigate the optical properties of microdroplet lasers.
  • To develop a microfluidic device for integrated droplet production and laser analysis.

Main Methods:

  • Fabrication of a microfluidic device for T-junction droplet generation.
  • In-situ detection and excitation of 50-micrometer diameter dye-doped microdroplets.

Related Experiment Videos

  • Optical excitation using multimode fibers and spectral analysis.

    • Main Results:

    • Intense lasing emission observed around the droplet rim.
    • Spectra revealed morphology-dependent resonances (MDRs) redshifted from bulk fluorescence.
    • Nonlinear dependence of resonant peak intensities on pump beam power confirmed.

    Conclusions:

    • Successful demonstration of lasing in microdroplets within a lower refractive index liquid.
    • Microfluidic integration enables efficient study of microdroplet laser dynamics.
    • Observed nonlinear optical behavior suggests potential for tunable laser applications.