Hong Peilong, Zhang Guoquan
J Opt Soc Am A Opt Image Sci Vis. 2015 Jul 1;32(7):1256-61. doi: 10.1364/JOSAA.32.001256.
By generalizing the phase structure of the random-phase grating we recently designed [Opt. Express21, 14056 (2013)OPEXFF1094-408710.1364/OE.21.014056], we show that non-HBT type (synchronous position) two-photon grating interference can be obtained, which physically relies on groups of multiple indistinguishable two-photon paths modulated by the spatial distributions of phase modes. By properly selecting the random-phase structures, synchronous position subwavelength interference can be obtained, the period of which, in the two-photon interference domain, is decreased by a factor N (=3,4,5,6,…), depending on the slit number and random-phase structure, and the visibility of N-fold subwavelength interference fringes could be improved by increasing the slit number of the grating. The results show that modulation on two-photon paths via spatial arrangements of the phase modes offers the possibility to actively control the optical high-order coherence in the same optical scheme.
通过推广我们最近设计的随机相位光栅的相位结构[《光学快报》21, 14056 (2013)OPEXFF1094 - 408710.1364/OE.21.014056]，我们表明可以获得非HBT型（同步位置）双光子光栅干涉，其物理上依赖于由相位模式的空间分布调制的多组不可区分的双光子路径。通过适当选择随机相位结构，可以获得同步位置亚波长干涉，在双光子干涉域中，其周期根据狭缝数量和随机相位结构按因子N（=3,4,5,6,…）减小，并且通过增加光栅的狭缝数量可以提高N倍亚波长干涉条纹的可见度。结果表明，通过相位模式的空间排列对双光子路径进行调制为在同一光学方案中主动控制光学高阶相干性提供了可能性。
