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Related Experiment Video

Updated: Jun 3, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Quantum light from a whispering-gallery-mode disk resonator.

J U Fürst¹, D V Strekalov, D Elser

¹Max Planck Institute for the Science of Light, Erlangen, Germany.

Physical Review Letters

|April 8, 2011

Summary

This summary is machine-generated.

Researchers directly observed intensity squeezing and twin-beam quantum correlations in parametric down-conversion using a whispering-gallery-mode resonator. This demonstrates a simple, feasible method for generating quantum light.

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

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Published on: April 4, 2016

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Last Updated: Jun 3, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Area of Science:

Quantum Optics
Nonlinear Optics
Solid-State Physics

Background:

Optical parametric down-conversion is a key method for generating nonclassical light.
This process can produce twin-beam correlations and intensity squeezing when driven above threshold.

Purpose of the Study:

To directly observe intensity squeezing in individual parametric beams.
To demonstrate twin-beam quantum correlations using a novel resonator.
To showcase the potential of whispering-gallery-mode resonators for quantum light generation.

Main Methods:

Utilized a high-quality whispering-gallery-mode disk resonator for parametric down-conversion.
Employed optical pumping far above threshold to induce nonlinear effects.
Measured individual beam intensity squeezing and twin-beam correlations.

Main Results:

Achieved direct observation of -1.2 dB intensity squeezing in each parametric beam.
Measured -2.7 dB twin-beam quantum correlations using the resonator cavity.
Demonstrated strong optical confinement and tunable coupling with the resonator.

Conclusions:

Whispering-gallery-mode resonators are effective for generating quantum light.
The demonstrated device offers a simple and feasible platform for quantum light applications.
This work highlights the potential of crystalline whispering-gallery-mode resonators in quantum optics.