Preparation of nonclassical quantumlight field

      Non-classical quantum light fields such as polarization entanglement and orbital angular momentum entanglement are essential resources for the study of quantum mechanics, quantum communication and quantum communication. The high-quality quantum light source is an important prerequisite for the completion of quantum optics experiments. Our group focused on the research of the non-classical light source, which is the critical technology of quantum information. We have prepared degenerate and-degenerate polarization-entangled light source, two-color orbit angular momentum entangled light source, narrow linewidth matching the atomic cash Classical photon source, in the PRA, OL, and other publications published a series of papers.

Papers：
[1] Z.-Y. Zhou, Y.-K. Jiang, D.-S. Ding, B.-S. Shi, and G.-C. Guo, Actively switchable nondegenerate polarization-entangled photon-pair distribution in dense wave-division multiplexing, Phys. Rev. A 87, 045806 (2013).
[2] Z.-Y. Zhou, Y. Li, D.-S. Ding, W. Zhang, S. Shi, B. -S. Shi, and G.-C. Guo, Classical to quantum optical network link for orbital angular momentum carrying light, Opt. Express 23, 18435-18444(2015).
[3] Z.-Y. Zhou, D.-S. Ding, Y. Li, F.-Y. Wang, and B.-S. Shi, Cavity-enhanced bright photon pairs at telecom wavelengths with a triple-resonance configuration, J. Opt. Soc. Am. B 31, 128 (2014).
[4] Z.-Y. Zhou, Y.-K. Jiang, D.-S. Ding, and B.-S. Shi, An ultra-broadband continuously-tunable polarization entangled photon-pair source covering the C+L telecom bands based on a single type-II PPKTPcrystal, J. mod. Opt., 60, 720(2013).

2: Quantum interface --- image frequency conversion

Infrared sensitive detectors currently used to detect infrared bands are expensive and have low detection efficiency. And infrared detection and biological detection, night vision, chemical imaging and other fields have a great application of our group around the infrared image detector to solve the poor accuracy, low efficiency and high-capacity quantum network of key technologies - high-dimensional quantum interface The frequency conversion of the image is realized by using the four-wave mixing effect of the atom for the first time, and the image of the infrared band is successfully converted to the visible band and probed with the visible light detector. The technical comment website of the MIT is " The infrared light into visible light sniffer "for the title of a positive evaluation. In the PRA, OL published a series of papers.

主要论文：
1.Dong-Sheng Ding, Zhi-Yuan Zhou, Wen Huang, Bao-Sen Shi, Xu-Bo Zou, and Guang-Can Guo. Experimental up-conversion of images. PHYSICAL REVIEW A 86, 033803 (2012).
2.Dong-Sheng Ding, Zhi-Yuan Zhou, Bao-Sen Shi, Xu-Bo Zou, and Guang-Can Guo. Image transfer through two sequential four-wave-mixing processes in hot atomic vapor. PHYSICAL REVIEW A 85, 053815 (2012).：