Knight J C, Dubreuil N, Sandoghdar V, Hare J, Lefèvre-Seguin V, Raimond J M, Haroche S
Opt Lett. 1996 May 15;21(10):698-700. doi: 10.1364/ol.21.000698.
We demonstrated the use of a near-field probe to map the evanescent field of an optical standing wave in a fused-silica whispering-gallery mode microresonator. The periodicity of the observed standing wave allows us to estimate accurately the radial mode number of the whispering-gallery mode resonance that is being excited. We find that the use of a fiber half-coupler to excite these resonances in fused-silica microspheres results in only the lowest radial mode numbers' being strongly excited, as predicted.
我们展示了使用近场探头来绘制熔融石英回音壁模式微谐振器中光学驻波的倏逝场。观察到的驻波的周期性使我们能够准确估计正在被激发的回音壁模式共振的径向模式数。我们发现，如预期的那样，使用光纤半耦合器在熔融石英微球中激发这些共振只会导致最低径向模式数被强烈激发。
