Simon H J, Wang Y, Zhou L B, Chen Z
Opt Lett. 1992 Sep 15;17(18):1268-70. doi: 10.1364/ol.17.001268.
We report the observation of coherent backscattering of optical second-harmonic generation that is due to excitation of the long-range surface plasmon mode at a silver-quartz interface. A peak-to-background ratio of greater than 2 is seen, which is possible for a coherent scattering process in nonlinear optics. The backscattering pattern has an angular half-width of 15 mrad in the incident plane but 90 mrad in the transverse plane. This effect is consistent with simple wave-vector considerations. Backscattering is observed only over a limited range of silver film thicknesses that correspond to a maximum propagation length for the surface mode.
我们报道了由于银-石英界面处的长程表面等离子体激元模式激发而产生的光学二次谐波的相干背散射观测结果。观察到峰谷比大于2，这对于非线性光学中的相干散射过程是可能的。背散射图案在入射平面内的角半高宽为15毫弧度，而在横向平面内为90毫弧度。这种效应与简单的波矢考虑是一致的。仅在对应于表面模式最大传播长度的有限银膜厚度范围内观察到背散射。
