2016/07/31 by J. A. Haigh, A. Nunnenkamp, A. J. Ramsay +1
Physics and Astronomy · #physics.optics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.117.133602
published as Phys. Rev. Lett. 117, 133602 (2016) · 6 pages + 3 pages supp. information
arxiv created 2016/09/22 · arxiv updated 2016/09/23
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.