Complex quantum state generation and coherent control based on integrated frequency combs

Piotr Roztocki, Stefania Sciara, Christian Reimer, Luis Romero Cortés, Yanbing Zhang, Benjamin Wetzel, Mehedi Islam, Bennet Fischer, Alfonso Cino, Sai T. Chu, Brent E. Little, David J. Moss, Lucia Caspani, José Azaña, Michael Kues, Roberto Morandotti

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
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The investigation of integrated frequency comb sources characterized by equidistant spectral modes was initially driven by considerations toward classical applications, seeking a more practical and miniaturized way to generate stable broadband sources of light. Recently, in the context of scaling the complexity of optical quantum circuits, these on-chip approaches have provided a new framework to address the challenges associated with non-classical state generation and manipulation. For example, multi-photon and high-dimensional states were to date either inaccessible, lacked scalability, or were difficult to manipulate, requiring elaborate approaches. The emerging field of quantum frequency combs studying spectral multimode sources based on the judicious excitation of (typically) third-order nonlinear optical micro-cavities has begun to address these issues. Several quantum sources based on this concept have already been demonstrated, among them are combs of correlated photons, cross-polarized photon pairs, entangled photon pairs, multi-photon states, and high-dimensional entangled states. While sources have achieved increasing complexity, so have coherent state processing operations, demonstrated in a practical manner using standard telecommunications components. Here, we review our recent work in the development of this framework, with a focus on multi-photon and high-dimensional states. The integrated frequency comb platform thus demonstrates significant potential for the development of meaningful quantum optical technologies.

Original languageEnglish
Article number8533605
Pages (from-to)338-344
Number of pages7
JournalJournal of Lightwave Technology
Issue number2
Early online date13 Nov 2018
Publication statusPublished - 15 Jan 2019


  • nanophotonics
  • photonic integrated circuits
  • quantum entanglement
  • spontaneous emission


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