Quantum Storage of Frequency-Multiplexed Heralded Single Photons

Alessandro Seri, Dario Lago-Rivera, Andreas Lenhard, Giacomo Corrielli, Roberto Osellame, Margherita Mazzera, Hugues de Riedmatten

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)


We report on the quantum storage of a heralded frequency-multiplexed single photon in an integrated laser-written rare-earth doped waveguide. The single photon contains 15 discrete frequency modes separated by 261 MHz and spanning across 4 GHz. It is obtained from a nondegenerate photon pair created via cavity-enhanced spontaneous down-conversion, where the heralding photon is at telecom wavelength and the heralded photon is at 606 nm. The frequency-multimode photon is stored in a praseodymium-doped waveguide using the atomic frequency comb (AFC) scheme, by creating multiple combs within the inhomogeneous broadening of the crystal. Thanks to the intrinsic temporal multimodality of the AFC scheme, each spectral bin includes 9 temporal modes, such that the total number of stored modes is about 130. We demonstrate that the storage preserves the nonclassical properties of the single photon, and its normalized frequency spectrum.

Original languageEnglish
Article number080502
JournalPhysical Review Letters
Issue number8
Early online date22 Aug 2019
Publication statusPublished - 23 Aug 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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