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Single mode lasing from hybrid hemispherical microresonators.

Rui Chen1, Van Duong Ta, Han Dong Sun

  • 1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore.

Scientific Reports
|April 28, 2012
PubMed
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Researchers developed a 3D hybrid microresonator for tunable single-mode microlasers. This optical microresonator demonstrates room-temperature lasing and offers a versatile platform for cavity quantum electrodynamics studies.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Optical microresonators are crucial for microlasers and cavity quantum electrodynamics.
  • Developing advanced microresonator structures is essential for next-generation photonic devices.

Purpose of the Study:

  • To demonstrate a novel three-dimensional (3D) hybrid microresonator.
  • To achieve room-temperature optically pumped lasing in a microcavity.
  • To investigate tunable single longitudinal mode lasing.

Main Methods:

  • Fabrication of a 3D hybrid microresonator using self-assembled hemispherical structures and a planar reflector.
  • Incorporation of dye molecules into the hemisphere.
  • Optical pumping and characterization of lasing behavior with varying cavity sizes and pump densities.

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Main Results:

  • Optically pumped lasing observed at room temperature.
  • Single longitudinal mode lasing achieved from hemispheres with a diameter of approximately 15 μm.
  • Lasing modes showed shifts under varying pump densities, explained by frequency shift and mode hopping.

Conclusions:

  • The demonstrated 3D hybrid microresonator offers a versatile approach for 3D light confinement.
  • This work presents an opportunity for realizing tunable single-mode microlasers.
  • The findings contribute to advancements in microcavity physics and photonic device applications.