Quantum prospects for hybrid thin-film lithium niobate on silicon photonics

Jeremy C. Adcock, Yunhong Ding

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Photonics is poised to play a unique role in quantum technology for computation, communications and sensing. Meanwhile, integrated photonic circuits—with their intrinsic phase stability and high-performance, nanoscale components—offer a route to scaling. However, each integrated platform has a unique set of advantages and pitfalls, which can limit their power. So far, the most advanced demonstrations of quantum photonic circuitry has been in silicon photonics. However, thin-film lithium niobate (TFLN) is emerging as a powerful platform with unique capabilities; advances in fabrication have yielded loss metrics competitive with any integrated photonics platform, while its large second-order nonlinearity provides efficient nonlinear processing and ultra-fast modulation. In this short review, we explore the prospects of dynamic quantum circuits—such as multiplexed photon sources and entanglement generation—on hybrid TFLN on silicon (TFLN/Si) photonics and argue that hybrid TFLN/Si photonics may have the capability to deliver the photonic quantum technology of tomorrow.
Original languageEnglish
JournalFrontiers of Optoelectronics
Issue number1
Number of pages7
Publication statusPublished - 2022


  • Quantum photonics
  • Quantum information
  • Quantum communications
  • Lithium niobate (LN)
  • Silicon photonics


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