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Switchable lasing in multimode microcavities.

Sergei V Zhukovsky1, Dmitry N Chigrin, Andrei V Lavrinenko

  • 1Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany. sergei@physik.uni-bonn.de

Physical Review Letters
|October 13, 2007
PubMed
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We introduce switchable multimode microlasers. Optical injection seeding allows control over selected laser modes, enabling temporal mode switching in photonic crystal microresonators.

Area of Science:

  • Photonics
  • Laser Physics
  • Materials Science

Background:

  • Microresonators are crucial for integrated optics.
  • Controlling laser modes in microcavities is challenging.
  • Photonic crystals offer unique light confinement properties.

Purpose of the Study:

  • To propose and theoretically demonstrate a switchable multimode microlaser.
  • To investigate mode selection via optical injection seeding.
  • To explore temporal mode switching in coupled-defect photonic crystal resonators.

Main Methods:

  • Modeling a two-dimensional photonic crystal with coupled defects as a multimode microresonator.
  • Theoretical analysis of injection seeding for mode selection.
  • Direct numerical solution to demonstrate temporal mode switching.

Related Experiment Videos

  • Qualitative analytical explanation using laser bistability.

    • Main Results:

    • Demonstrated theoretical control of lasing into a selected mode using optical injection seeding.
    • Successfully showed temporal mode-to-mode switching by reseeding after a cooldown period.
    • Provided an analytical explanation for mode switching based on laser bistability.

    Conclusions:

    • The proposed switchable multimode microlaser concept is theoretically validated.
    • Injection seeding offers a viable method for dynamic mode control in micro-lasers.
    • This work opens possibilities for tunable and reconfigurable photonic devices.