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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
Summary
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.
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.
