Mid-infrared spectrally-pure single-photon states generation from 23 nonlinear optical crystals

Author / Creator

Quantum 2020 (2020)

Conferences

Quantum 2020 P5: Quantum sensing, metrology and imaging (2020)

Available as

Online

Summary

The mid-infrared (MIR) wavelength range (approximately 2-20 μm) is of great interest to a variety of applications. However, the advantages of the MIR range have not been fully exploited using quant...

The mid-infrared (MIR) wavelength range (approximately 2-20 μm) is of great interest to a variety of applications. However, the advantages of the MIR range have not been fully exploited using quantum technology. It is still lack of high-quality quantum sources for the MIR range. In this work, we theoretically study the preparation of pure-state single-photon source from 23 nonlinear optical crystals, including birefringent crystals CMTC, LIIO3, AAS, HGS, CGA, TAS, AGS, AGSE, GASE, LIS, LISE, LGS, and LGSE; periodic poling crystals LT, LN, KTP, KN, CSP, ZGP, BATIO3, MGBAF4, OP-ZNSE, and PMN-0.38PT. Calculation results show that these crystals satisfy three kinds of group-velocity-matching (GVM) conditions. The down-converted photons wavelength range is from 1298 to 7384 nm for the GVM1 condition, from 2312 to 11650 nm for the GVM2 condition, and from 1658 to 9380 nm for the GVM3 condition. The spectral purities for three kinds of GVM conditions are around 0.97, 0.97, and 0.82, respectively. We also calculate their performance in the Hong-Ou-Mandel interference from independent sources, and it can also achieve visibility as high as 97%. This study may provide high-quality heralded single-photon sources and entangled photon sources for quantum sensing, imaging, and communications at the MIR wavelength range.

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