Photon Conversion and Interaction in a Quasi-Phase-Matched Microresonator

Jia Yang Chen, Zhan Li, Zhaohui Ma, Chao Tang, Heng Fan, Yong Meng Sua, Yu Ping Huang

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The conversion and interaction between quantum signals at the single-photon level are essential for scalable quantum photonic information technology. Using a fully optimized periodically poled lithium niobate microring, we demonstrate ultraefficient sum-frequency generation on a chip. The external quantum efficiency reaches (65±3)% with only (104±4)-μW pump power. At peak conversion, 3×10-5-noise photon is created during the cavity lifetime, which meets the requirement of quantum applications using single-photon pulses. Using a pump and signal in single-photon coherent states, we directly measure the conversion probability produced by a single pump photon to be 10-5, which is a significant improvement from the state of the art, and the photon-photon coupling strength to be 9.1 MHz. Our results mark steady progress toward quantum nonlinear optics at the ultimate single-photon limit, with potential applications in highly integrated photonics and quantum optical computing.

Original languageEnglish
Article number064004
JournalPhysical Review Applied
Volume16
Issue number6
DOIs
StatePublished - Dec 2021

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