Hong Peilong, Li Liming, Liu Jianji, Zhang Guoquan
The MOE Key Laboratory of Weak Light Nonlinear Photonics, School of Physics and TEDA Applied Physics Institute, Nankai University, Tianjin 300457, China.
Sci Rep. 2016 Mar 29;6:23614. doi: 10.1038/srep23614.
Young's double-slit or two-beam interference is of fundamental importance to understand various interference effects, in which the stationary phase difference between two beams plays the key role in the first-order coherence. Different from the case of first-order coherence, in the high-order optical coherence the statistic behavior of the optical phase will play the key role. In this article, by employing a fundamental interfering configuration with two classical point sources, we showed that the high- order optical coherence between two classical point sources can be actively designed by controlling the statistic behavior of the relative phase difference between two point sources. Synchronous position Nth-order subwavelength interference with an effective wavelength of λ/M was demonstrated, in which λ is the wavelength of point sources and M is an integer not larger than N. Interestingly, we found that the synchronous position Nth-order interference fringe fingerprints the statistic trace of random phase fluctuation of two classical point sources, therefore, it provides an effective way to characterize the statistic properties of phase fluctuation for incoherent light sources.
杨氏双缝或双光束干涉对于理解各种干涉效应至关重要，其中两束光之间的固定相位差在一阶相干中起着关键作用。与一阶相干情况不同，在高阶光学相干中，光学相位的统计行为将起关键作用。在本文中，通过采用具有两个经典点光源的基本干涉配置，我们表明可以通过控制点光源之间相对相位差的统计行为来主动设计两个经典点光源之间的高阶光学相干。展示了具有有效波长为λ/M的同步位置第N阶亚波长干涉，其中λ是点光源的波长，M是不大于N的整数。有趣的是，我们发现同步位置第N阶干涉条纹描绘了两个经典点光源随机相位波动的统计轨迹，因此，它提供了一种有效方法来表征非相干光源相位波动的统计特性。
