Quantum entanglement and interference at 3 μm

Given the important advantages of the mid-infrared optical range (2.5 to 25 μm) for biomedical sensing, optical communications, and molecular spectroscopy, extending quantum information technology to this region is highly attractive. However, the development of mid-infrared quantum information techn...

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Bibliographic Details
Published in:Science advances 2024-03, Vol.10 (10), p.eadm7565-eadm7565
Main Authors: Ge, Zheng, Han, Zhao-Qi-Zhi, Yang, Fan, Wang, Xiao-Hua, Li, Yin-Hai, Li, Yan, Gao, Ming-Yuan, Chen, Ren-Hui, Niu, Su-Jian, Xie, Meng-Yu, Zhou, Zhi-Yuan, Shi, Bao-Sen
Format: Article
Language:English
Subjects:
Optics
Physical and Materials Sciences
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Summary:Given the important advantages of the mid-infrared optical range (2.5 to 25 μm) for biomedical sensing, optical communications, and molecular spectroscopy, extending quantum information technology to this region is highly attractive. However, the development of mid-infrared quantum information technology is still in its infancy. Here, we report on the generation of a time-energy entangled photon pair in the mid-infrared wavelength band. By using frequency upconversion detection technology, we observe the two-photon Hong-Ou-Mandel interference and demonstrate the time-energy entanglement between twin photons at 3082 nm via the Franson-type interferometer, verifying the indistinguishability and nonlocality of the photons. This work is very promising for future applications of optical quantum technology in the mid-infrared band, which will bring more opportunities in the fields of quantum communication, precision sensing, and imaging.
ISSN:2375-2548
2375-2548
DOI:10.1126/sciadv.adm7565