Design of mid-infrared entangled photon sources using lithium niobate

Author:

Zhu Jin-Long,Zhu Wen-Xin,Shi Xiao-Tao,Zhang Chen-Tao,Hao Xiangying,Yang Zi-Xiang,Jin Rui-BoORCID

Abstract

The mid-infrared (MIR) band entangled photon source is vital for the next generation of quantum communication, quantum imaging, and quantum sensing. However, the current entangled states are mainly prepared in the visible or near-infrared bands. It is still lacking high-quality entangled photon sources in the MIR band. In this work, we optimize the poling sequence of lithium niobate to prepare two kinds of typical entangled states, the Hermit–Gaussian state and the comb-like entangled state at 3.2 µm. We have also calculated the photon pair rates and estimated the effect of fabrication resolution in the schemes. Our approach will provide entangled photon sources with excellent performance for the study of quantum information in the MIR band.

Funder

National Natural Science Foundation of China

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics

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