Quantum photonics & information

Quantum photonics & information

Research activities

The Quantum Photonics & Information team is one of the leading group in the field of quantum photonics engineering and technologies. Its research topics lie in fundamental and applied quantum optics and information. More specifically, photonic systems operating in the telecom range are realized for demonstrating quantum supremacy in communication and metrology applications. Those devices, mostly based on integrated photonic circuits, make it possible to exploit simultaneously highly efficient nonlinear optical interactions and the active routing of information. This is an actual asset for the generation of on-demand engineered quantum states, based whether on discrete, continuous, or hybrid variables. These devices are developed in close collaboration with the Integrated Nonlinear Optics (ONLI) team and its technological platform (Optinil).

Current Projects

We are specialized in the study and the use of integrated optical devices for quantum information science operating in the telecom range. It gathers skills and experimental techniques in quantum interferometry, in multi-photon correlation measurements, high-speed quantum optics, long distance quantum communication, as well as in non-linear guided-wave optics.

Quantum  key distribution over metropolitan  network

We are developing a real-field quantum cryptographic link between two remote location in the region of Nice. It consists in the development of a broadband entanglement source and the distribution of photon pairs along a fibre link of 30km. Entanglement measurement will be performed, as well as optimization of photon pair rate using wavelength multiplexing scheme. Keywords : photon pair sources, energy-time entanglement, telecom network, wavelength multiplexing, network synchronization, guided-wave technology.

metropolitan quantum network

Collaboration : Orange lab

Contact : sebastien.tanzilli(at)univ-cotedazur.fr

Squeezed light on chip

We are also considering exploiting integrated technology to manipulate continuous variable of light. In this context, squeezed bright beams are generated and homodyne detection are performed on chip. Keywords : photon pair sources, wavelength conversion, quadrature of light, lithium niobate, integrated optics, homodyne detection.

Squeezed light on chip

Collaboration : LENS (Italy)

Contact : virginia.dauria(at)univ-cotedazur.fr

Hybrid quantum state of light

The wave-particle duality of light has led to two traditionally-separated encodings of information: a ‘discrete-variable’ (DV) approach, based for instance on single photons, and a ‘continuous-variable’ (CV) one, which relies on continuous degrees of freedom such as amplitude and phase of a light field. Hy-Light enters into the emerging but potentially powerful endeavor of performing a hybridization between DV and CV tools and concepts has been foreseen as a key approach to gather the benefits from both regimes and to circumvent their individual limitations.

Hybrid styates of light

Collaboration : LKB (France), MPQ (France)

Contact : virginia.dauria(at)univ-cotedazur.fr

Quantum simulation in waveguide arrays

Manipulation of light flow in evanescently coupled waveguide arrays holds great promise for simulation of quantum transport and interference that can be observed and manipulated in the coupled arrays. To this end, entangled photon pair will be injected in three dimension photonic structures based on direct-laser-writing platform. Mapping of the simulated Hamiltonian over a 3D photonic structure is a key task. Keywords : Boson sampling, Bose-Hubbard model, path entanglement, laser written waveguide, entangled photon pairs, quantum simulation.

waveguide arrays

Collaboration :

Contact : olivier.alibart(at)univ-cotedazur.fr

High speed quantum networking

High-speed quantum networking is also a great challenge of quantum technologies. Two-photon interference is at the heart of quantum network and the challenge lies in the accurate synchronisation of independent photon pair sources. We have developed an original all-optical synchronisation protocol enabling 10GHz operation rate. High-speed measurement of two-photon interference of independent photon pair source is to be performed. Keywords : optical frequency conversion, quantum networking, two-photon interference, clock synchronisation, photon pair source, time-bin entanglement.


Collaboration :

Contact : virginia.dauria(at)univ-cotedazur.fr

Quantum  metrology

The project aims at exploiting the supremacy of quantum optical metrology over classical methods for assessing and refining specialty fiber properties with unprecedented accuracy and reliability. The development of a quantum-based plug-and-play chromatic dispersion measurement benchtop stands as the cornerstone of the project. It will serve as a key enabling tool all along the project for fiber qualification, with direct and efficient feedback to the design and manufacturing process flow. Keywords : Two-photon interference, energy-time entanglement, chromatic dispersion, photon pair.

quantum metrology

Collaboration : XLIM (France)

Contact : laurent.labonte(at)univ-cotedazur.fr

Silicon quantum photonics

Developing a novel, silicon based, integrated quantum photonics platform showing gradually augmented and beyond state-of-the-art capabilities. Our ambition lies in the dense integration of both linear and non-linear optical functionalities enabling, on single substrates, the generation, the routing, the advanced manipulation, as well as the detection, of photonic quantum states. The addressed challenges are multiple and have not been tackled so far on chip: i) achievement of standard and heralded two-photon entanglement demonstrators, ii) simulation of quantum operators based on arrays of coupled waveguides, and iii) development of high bit-rate quantum cryptography protocols based on multi-frequency coding.

silicon chip

Collaboration : C2N (France), LEAT (France), INRIA (France)

Contact : laurent.labonte(at)univ-cotedazur.fr

Integrated quantum memories

In this project, we investigate a ridge-waveguide based architecture for the integration of rare-earth-ion doped crystals. When cooled down to cryogenic temperatures, these materials possess very long coherence times as well in the optical as in the radiofrequency domain, making them valuable for implementing quantum memory protocols. In particular, we investigate the integration of the atomic frequency comb protocol within a praseodymium doped Y2SiO5 ridge-waveguide crystal.

ridge memory

Contact : jean.etesse(at)univ-cotedazur.fr

Jobs & Internships

PhD and post-doc position

No specific PhD or Post-doc grant these days

You can  apply for university Cote d'Azur contract, please apply here.


We regularly offer internship positions for Master (graduated) or Licence (undergraduates) degrees. If you are interested to join us, please feel free to contact one of us.

Some example

  • Métrologie quantique
  • Photonique quantique intégrée : Source de photon uniques dans levisible à base de GaN
  • Continuous variable on chip
  • Quantum memory



High-quality photonic entanglement out of a stand-alone silicon chip (2020)

Dorian Oser, Sébastien Tanzilli, Florent Mazeas, Carlos Alonso-Ramos, Xavier Le Roux et al. NJP Quantum Information, Nature, 2020, 6 (1)

A universal, plug-and-play synchronisation scheme for practical quantum networks. npj Quantum Information (2020)

Virginia d'Auria, Bruno Fedrici, Lutfi Arif Ngah, Florian Kaiser, Laurent Labonté, et al., Nature, 2020, 6 (1),

Silicon photonics interfaced with integrated electronics for 9 GHz measurement of squeezed light. (2020)

Joel Tasker, Jonathan Frazer, Giacomo Ferranti, Euan Allen, Léandre Brunel, et al. Nature Photonics, Nature Publishing Group

Generalized approach for enabling multimode quantum optics (2020)

Elie Gouzien, Sébastien Tanzilli, Virginia d'Auria, Giuseppe Patera. Physical Review Letters, American Physical Society, 125, pp.103601.

Photorefractive effect in LiNbO 3 -based integrated-optical circuits for continuous variable experiments (2020)

François Mondain, Floriane Brunel, Xin Hua, Élie Gouzien, Alessandro Zavatta et al. Optics Express, Optical Society of America - OSA Publishing

Two-photon phase-sensing with single-photon detection (2020)

Panagiotis Vergyris, Charles Babin, Raphael Nold, Élie Gouzien, Harald Herrmann et al. Applied Physics Letters, American Institute of Physics, 117 (2), pp.024001

A scheme for the generation of hybrid entanglement between time-bin and wave-like encoding (2020)

Élie Gouzien, Floriane Brunel, Sébastien Tanzilli, Virginia D 'Auria. Physical Review A, American Physical Society 2020, 102 (1)

Superthermal-light emission and nontrivial photon statistics in small lasers (2020)

T. Wang, D. Aktas, Olivier Alibart, É. Picholle, G. Puccioni et al. Physical Review A, American Physical Society, 101 (6),

Silicon subwavelength modal Bragg grating filters with narrow bandwidth and high optical rejection (2020)

Dorian Oser, Diego Pérez-Galacho, Xavier Le Roux, Sébastien Tanzilli, Laurent Vivien et al. Optics Letters, Optical Society of America - OSA Publishing,, 45 (20), pp.5784

Fibre based hyperentanglement generation for dense wavelength division multiplexing (2019)

Panagiotis Vergyris, Florent Mazeas, Élie Gouzien, Laurent Labonté, Olivier Alibart et al. Quantum Science and Technology, IOP Science, 4 (4), pp.045007.

Chip-based squeezing at a telecom wavelength (2019)

François Mondain, Tommaso Lunghi, Alessandro Zavatta, Élie Gouzien, Florent Doutre et al. Photonics Research, OSA Publishing, 7 (7), pp.A36.

Quantum optical frequency up-conversion for polarisation entangled qubits: towards interconnected quantum information devices (2019)

Florian Kaiser, Panagiotis Vergyris, Anthony Martin, Djeylan Aktas, Marc P. de Micheli et al. Optics Express, Optical Society of America - OSA Publishing, 27 (18), pp.25603.

Coherency‐Broken Bragg Filters: Overcoming On‐Chip Rejection Limitations (2019)

Dorian Oser, Florent Mazeas, Xavier Le Roux, Diego Pérez‐galacho, Olivier Alibart et al. Laser and Photonics Reviews, Wiley-VCH Verlag, 13 (8), pp.1800226.

Quantum description of timing jitter for single-photon ON-OFF detectors (2018)

E. Gouzien, B. Fedrici, A. Zavatta, S. Tanzilli, V. D’Auria, Phys. Rev. A, 98, 013833 (2018).

Broadband integrated beam splitter using spatial adiabatic passage (2018)

T. Lunghi, F. Doutre, A. P. Rambu, M. Bellec, M. P. DeMicheli, A. M. Apetrei, O. Alibart, N. Belabas, S. Tascu, and S. Tanzilli - Opt. Express 26, 27058-27063 (2018)

Minimum resources for versatile continuous-variable entanglement in integrated nonlinear waveguides (2018)

D. Barral, K. Bencheikh, V. D'Auria, S. Tanzilli, N. Belabas, and J. A. Levenson, Phys. Rev. A, 98, 023857 (2018)

Continuous-variable entanglement of two bright coherent states that never interacted (2017)

D. Barral, N. Belabas, L. M. Procopio, V. D’Auria, S. Tanzilli, K. Bencheikh, and J. A. Levenson, Phys. Rev. A 96, 053822 (2017)

Optical pump-rejection filter based on silicon sub-wavelength engineered photonic structures (2017)

D. Pérez-Galacho, C. Alonso-Ramos, F. Mazeas, X. Le Roux, D. Oser, W. Zhang, D. Marris-Morini, L. Labonté, S. Tanzilli, E. Cassan and L. Vivien - Opt. Lett. 42, 1468-1471 (2017)

On-chip generation of heralded photon-number states (2016)

P. Vergyris, T. Meany, T. Lunghi, G. Sauder, J. Downes, M. J. Steel, M. J. Withford, O. Alibart, and S. Tanzilli - Scientific Reports 6, 35975 (2016)

Entanglement distribution over 150 km in wavelength division multiplexed channels for quantum cryptography (2016)

D. Aktas, B. Fedrici, F. Kaiser, T. Lunghi, L. Labonté, and S. Tanzilli - Laser & Photonics Reviews, 10: 451-457 (2016)

Squeezing at a telecom wavelength, a compact and fully guided-wave approach (2016)

F. Kaiser, B. Fedrici, A. Zavatta, V. D’Auria, and S. Tanzilli - Optica 3, 362-365 (2016)

High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip (2016)

F. Mazeas, M. Traetta, M. Bentivegna, F. Kaiser, D. Aktas, W. Zhang, C. A. Ramos, L. A. Ngah, T. Lunghi, É. Picholle, N. Belabas-Plougonven, X. Le Roux, É. Cassan, D. Marris-Morini, L. Vivien, G. Sauder, L. Labonté, and S. Tanzilli - Opt. Express 24, 28731-28738 (2016)

Quantum nonlocality with arbitrary limited detection efficiency (2016)

G. Pütz, A. Martin, N. Gisin, D. Aktas, B. Fedrici, and S. Tanzilli - Phys. Rev. Lett. 116, 010401 (2016).

Optimal analysis of ultra broadband energy-time entanglement for high bit-rate dense wavelength division multiplexed quantum networks (2016)

F Kaiser, D Aktas, B Fedrici, T Lunghi, Laurent Labonté, Sébastien Tanzilli - Appl. Phys. Lett. 108, 231108 (2016)

Temporal intensity correlation of light scattered by a hot atomic vapor (2016)

A. Dussaux, T. Passerat de Silans, W. Guerin, O. Alibart, S. Tanzilli, F. Vakili, R. Kaiser - Phys. Rev. A 93, 043826 (2016)

Quantum photonics at telecom wavelengths based on lithium niobate waveguides (2016)

O. Alibart, V. D'Auria, M. De Micheli, F. Doutre, F. Kaiser, L. Labonté, T. Lunghi, É. Picholle and S. Tanzilli - J. Opt. 18 104001(2016)

Quantum teleportation and nonlocality: the puzzling predictions of entanglement are coming of age (2015)

N. Gisin, S. Tanzilli and W. Tittel - Europhysics News 46/5-6, p. 36–40 (2015)

Demonstration of Quantum Nonlocality in presence of Measurement Dependence (2015)

D. Aktas, S. Tanzilli, A. Martin, G. Pütz, R. Thew, N. Gisin - Phys. Rev. Lett. 114, 220404 (2015)

Ultra-fast heralded single photon source based on telecom technology (2015)

Lutfi-Arif Bin-Ngah, Olivier Alibart, Laurent Labonté, Virginia D’Auria,Sébastien Tanzilli - Laser & Photonics Reviews, 9: L1-L5 (2015)

Toward Continuous-Wave Regime Teleportation for Light Matter Quantum Relay Stations (2015)

F. Kaiser, A. Issautier, L. A. Ngah, D. Aktas, T. Delord, S. Tanzilli - IEEE Journal of Selected Topics in Quantum Electronics, 21, 3, pp. 69-77 (2015)

Fluctuation properties of laser light after interaction with an atomic system: Comparison between two-level and multilevel atomic transitions (2015)

A. Lezama, R. Rebhi, A. Kastberg , S. Tanzilli and R. Kaiser - Phys. Rev. A 92, 033853 (2015)

Polarization entangled photon-pair source based on quantum nonlinear photonics and interferometry (2014)

F. Kaiser, L.A. Ngah, A. Issautier, T. Delord, D. Aktas, V. D'Auria, M. De Micheli, A. Kastberg, L. Labonté, O. Alibart, A. Martin, S. Tanzilli - Optics Communications, 327, pp 7-16 (2014)

Hybrid photonic circuit for multiplexed heralded single photons (2014)

T. Meany, L. A. Ngah, M. J. Collins, A. S. Clark, R. J. Williams, B. J. Eggleton, M. J. Steel, M. J. Withford, O. Alibart, S. Tanzilli - Laser & Photonics Reviews, 8: L42-L46 (2014)

Two-photon interference between disparate sources for quantum networking (2013)

A. R. McMillan, L. Labonté, A. S. Clark, B. Bell, O. Alibart, A. Martin, W. J. Wadsworth, S. Tanzilli & J. G. Rarity - Scientific Reports 3, 2032 (2013)

A versatile source of polarisation entangled photons for quantum network applications (2013)

F. Kaiser, A. Issautier, L. A. Ngah, O. Alibart, A. Martin and S. Tanzilli - Laser Phys. Lett. 10 045202

Cross time-bin photonic entanglement for quantum key distribution (2013)

A. Martin, F. Kaiser, A. Vernier, A. Beveratos, V. Scarani, and S. Tanzilli - Phys. Rev. A 87, 020301(R) (2013)

Entanglement-enabled delayed-choice experiment (2012)

F. Kaiser, T. Coudreau, P. Milman, D. B. Ostrowsky, and S. Tanzilli - Science 338, 637-640 (2012).

A quantum relay chip based on telecommunication integrated optics technology (2012)

A. Martin, O. Alibart, M. P. De Micheli, D. B. Ostrowsky and S. Tanzilli - New J. Phys. 14 025002 (2012)

On the genesis and evolution of Integrated Quantum Optics (2012)

S. Tanzilli, A. Martin, F. Kaiser, M.P. De Micheli, O. Alibart, D.B. Ostrowsky - Laser & Photon. Rev., 6: 115-143 (2012)

CSS Global

CSS Local