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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Optomagnonic Whispering Gallery Microresonators.

Xufeng Zhang¹, Na Zhu¹, Chang-Ling Zou^1,2

¹Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.

Physical Review Letters

|October 1, 2016

Summary

This summary is machine-generated.

Yttrium iron garnet (YIG) magnons enable efficient microwave-to-optical conversion. This study demonstrates enhanced Brillouin scattering in an optomagnonic cavity, paving the way for novel information processing applications.

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Area of Science:

Quantum optics
Condensed matter physics
Photonics

Background:

Magnons in yttrium iron garnet (YIG) are explored for microwave information processing.
Optomagnonic cavities offer potential for coherent control of magnons.

Purpose of the Study:

To demonstrate optical whispering gallery modes in a YIG sphere coupled to a photonic waveguide.
To investigate magnon-mediated microwave-to-optical carrier conversion.

Main Methods:

Fabrication and surface treatment of a YIG sphere.
Coupling the YIG sphere to a silicon nitride photonic waveguide.
Utilizing an optomagnonic cavity to enhance Brillouin scattering.

Main Results:

Achieved high-quality optical whispering gallery modes (Q factors ~10^6) in the telecom C band.
Observed efficient Brillouin scattering of photons with orthogonal polarization.
Demonstrated enhanced scattering through triply resonant magnon, pump, and signal photon modes.

Conclusions:

YIG magnons show promise for mediating microwave-to-optical carrier conversion.
The demonstrated optomagnonic system is a key step towards integrated quantum microwave-optical devices.