Haigh J A, Nunnenkamp A, Ramsay A J, Ferguson A J
Hitachi Cambridge Laboratory, Cambridge CB3 0HE, United Kingdom.
Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
Phys Rev Lett. 2016 Sep 23;117(13):133602. doi: 10.1103/PhysRevLett.117.133602. Epub 2016 Sep 21.
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 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 wave vector 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.
在调谐到三重共振点的磁光回音壁模式谐振器中，展示了光学光子与磁振子的布里渊光散射增强。当输入和输出光学模式都与回音壁谐振器的模式共振时，就会出现这种情况，其间隔由铁磁共振频率给出。特定光学模式的识别和激发使我们能够清楚地理解模式匹配条件。由于波矢匹配产生的选择规则导致了本征单边带激发。对于相干光到微波转换中的一对一频率映射，一个边带的强烈抑制至关重要。
