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Dielectric structures with bound modes for microcavity lasers.

P M Visser1, K Allaart, D Lenstra

  • 1Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands. PMV@nat.VU.nl

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 13, 2002
PubMed
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Researchers propose novel microstructures for perfectly confined light modes, overcoming leakage issues in current dielectric microspheres and vertical cavity surface emitting lasers. This breakthrough enables enhanced control over light propagation and amplification in three dimensions.

Area of Science:

  • Photonics and optical physics.
  • Materials science and nanotechnology.

Background:

  • Dielectric microspheres and vertical cavity surface emitting lasers exhibit high quality (Q) factors but suffer from finite mode widths due to radiative leakage.
  • Achieving perfectly confined optical modes is crucial for advanced photonic devices and lasers.

Purpose of the Study:

  • To propose and analyze novel microstructures capable of sustaining three-dimensionally bound radiation field modes.
  • To investigate photonic systems that utilize reduced dimensionality periodicity for light confinement.

Main Methods:

  • Design of microstructures based on anisotropic dielectric tensors, achieved through patterned air holes in isotropic materials.
  • Analytical study of light propagation and amplification in a cavity composed of crossed vertical and horizontal periodic layers.

Related Experiment Videos

  • Calculation of cavity resonance frequencies and spontaneous emission rates.

    • Main Results:

    • Demonstration of microstructures that support exactly bound modes, eliminating border leakage.
    • The proposed systems rely on one- or two-dimensional periodicity, offering a simpler alternative to full photonic crystals.
    • Analytical tractability of the proposed laser geometry facilitates detailed study of light-matter interactions.

    Conclusions:

    • The proposed microstructures offer a pathway to achieving truly bound optical modes, enhancing laser performance and light confinement.
    • The simplified dimensionality of periodicity provides a more accessible design for advanced photonic cavities.
    • The analytical approach allows for precise prediction and optimization of cavity resonance and emission rates.