高维量子接口--轨道角动量变频
轨道角动量因其特殊的空间位相结构和无限维的希尔伯特空间使它在高容量光通信、微小粒子的捕获和操控、成像、精密测量和高维量子信息中具有重要的应用。利用轨道角动量变频可以实现不同波长轨道角动量光束的任意变换。此外单光子轨道角动量频率变换可以实现不同波长轨道角动量量子体系的波长链接，实现轨道角动量信息在不同波长量子体系交换的重要组成部分。其研究对于基于轨道角动量维度的高维量子信息具有重要意义。
我们小组围绕高容量量子网络的关键技术--高维量子接口的实现开展了轨道角动量的变频研究，首次利用周期性非线性晶体的二阶非线性效应实现了图像的频率上转换，并成功实现单光子的频率变换，为高维量子接口的实现奠定基础。在PRA、OL、OE等刊物发表系列论文。
主要论文：
[1] Z.-Y. Zhou, Y. Li, D.-S. Ding, Y.-K. Jiang, W. Zhang, S. Shi, B.-S. Shi, and G.-C. Guo, Generation of light with controllable spatial patterns via the sum frequency in quasi-phase matching crystals, Scientific. Reports 4, 5650 (2014).
[2] Z.-Y. Zhou, D.-S. Ding, Y.-K. Jiang, Y. Li, S. Shi, X.-S. Wang, and B.-S. Shi, Orbital angular momentum light frequency conversion and interference with quasi-phase matching crystals, Optics Express 22, 20298 (2014).
[3] Z.-Y. Zhou, Y. Li, D.-S. Ding, Y.-K. Jiang, W. Zhang, S. Shi, B.-S. Shi, and G.-C. Guo, Highly efficient second harmonic generation of a light carrying orbital angular momentum in an external cavity, Optics Express 22, 23673 (2014).
[4] Y. Li, Z.-Y. Zhou, D.-S. Ding, and B.-S. Shi, Sum frequency generation with two orbital angular carrying laser beams, J. Opt. Soc. Am. B 32, 407(2015).
[5] Y. Li, Z.-Y. Zhou, D.-S. Ding, W. Zhang, S. Shi, B.-S. Shi, and G.-C. Guo, Orbital angular photonic quantum interface, arXiv:1410.7543 [quant-ph].
