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Radiation-pressure-induced mode splitting in a spherical microcavity with an elastic shell
Optics Express
|June 18, 2009
Summary
We demonstrate a new method to control azimuthal whispering gallery modes (WGMs) in quantum dot-coated microcavities. Laser-induced deformation precisely tunes WGM splitting and linewidth by manipulating radiation pressure and shell elasticity.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Whispering gallery modes (WGMs) are crucial for microcavity applications.
- Controlling WGMs in spherical microcavities with quantum dots is challenging.
- Existing methods often lack non-contact and precise tunability.
Purpose of the Study:
- To introduce a novel non-contact method for revealing azimuthal WGMs.
- To demonstrate control over WGM degeneracy lifting in spherical microcavities.
- To investigate the influence of radiation pressure and shell elasticity on WGM parameters.
Main Methods:
- Coating a spherical microcavity with a polyelectrolyte shell and CdTe quantum dots.
- Utilizing laser-induced radiation pressure to deform the microcavity non-destructively.
- Analyzing the resulting changes in WGM resonance peak linewidth and splitting.
Main Results:
- Successfully revealed azimuthal WGMs in the modified microcavity.
- Demonstrated non-contact deformation of the spherical cavity via laser radiation pressure.
- Showed efficient control over WGM degeneracy, linewidth, and splitting parameters.
- Correlated control parameters with the strength of radiation pressure and shell elasticity.
Conclusions:
- The presented method offers precise, non-contact control over WGMs in quantum dot-functionalized microcavities.
- This technique enables tunable optical properties for advanced photonic devices.
- Radiation pressure-induced deformation is an effective mechanism for manipulating microcavity resonances.
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