Abstract

We explore a mechanism for producing time-frequency entangled photon pairs (termed a biphoton) from an ensemble of atom-like solid-state quantum emitters. Four distinct energy levels of the solid-state system render four spin-conserving optical transitions as observed in color centers. This feature opens up the possibility to generate a four-wave mixing biphoton based on an electromagnetic induced transparency (EIT) for long-coherence quantum communication as demonstrated in cold atomic systems. We propose a narrow EIT window below a lifetime-limited linewidth of a SiV in diamond, assuming a few hundred MHz. Consequently, the EIT-induced narrowband guarantees biphoton coherence time to be at least a few tens of a nanosecond without a cavity. Assessing the criteria of solid-state parameters applicable to the existing biphoton model from cold atoms will accelerate solid-state biphoton source research. This study shows that a realization of negligible ground state dephasing of a solid-state sample will be a crucial step toward a solid-state biphoton generation for more than a 100 ns time scale with a subnatural atomic linewidth of a few MHz.

© 2019 Optical Society of America

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Corrections

Heejeong Jeong, Shengwang Du, and Na Young Kim, "Proposed narrowband biphoton generation from an ensemble of solid-state quantum emitters: publisher’s note," J. Opt. Soc. Am. B 36, 846-846 (2019)
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-36-4-846

21 February 2019: A correction was made to the funding section.


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