Efficient parametric frequency conversion in lithium niobate nanophotonic chips

Jia Yang Chen, Yong Meng Sua, Zhao Hui Ma, Chao Tang, Zhan Li, Yu Ping Huang

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

Chip-integrated nonlinear photonics holds the key for advanced optical information processing with superior performance and novel functionalities. Here, we present an optimally mode-matched, periodically poled lithium niobate nanowaveguide for efficient parametric frequency conversions on chip. Using a 4-mm nanowaveguide with subwavelength mode confinement, we demonstrate second harmonic generation with efficiency over 2200% W−1cm−2, and broadband difference frequency generation over a 4.3-THz spectral span. These allow us to generate correlated photon pairs over multiple frequency channels via spontaneous parametric down conversion, all in their fundamental spatial modes, with a coincidence to accidental ratio as high as 600. The high efficiency and dense integrability of the present chip devices may pave a viable route to scalable nonlinear applications in both classical and quantum domains.

Original languageEnglish
Pages (from-to)2914-2924
Number of pages11
JournalOSA Continuum
Volume2
Issue number10
DOIs
StatePublished - 15 Oct 2019

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