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arXiv · 1607.02985

Triple-resonant Brillouin light scattering in magneto-optical cavities

J. A. Haigh·A. Nunnenkamp·A. J. Ramsay·A. J. Ferguson
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Abstract

An enhancement in Brillouin light scattering of optical photons with magnons is demonstrated in magneto-optical whispering gallery mode resonators tuned to a triple resonance point. This occurs when both the input and output optical modes are resonant with those of the whispering gallery resonator, with a separation given by the ferromagnetic resonance (FMR) frequency. The identification and excitation of specific optical modes allows us to gain a clear understanding of the mode-matching conditions. A selection rule due to wavevector matching leads to an intrinsic single-sideband excitation. Strong suppression of one sideband is essential for one-to-one frequency mapping in coherent optical-to-microwave conversion.

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J. A. Haigh, A. Nunnenkamp, A. J. Ramsay, A. J. Ferguson. 2016-09-22. Triple-resonant Brillouin light scattering in magneto-optical cavities. https://doi.org/10.1103/physrevlett.117.133602

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