Contact: Alejandro GIACOMOTTI
This project, at the interface between nanophotonics and quantum optics, is related to the nascent domain of driven dissipative coupled cavities in a quantum regime. Recently, a few theoretical studies have shown that nonlinear coupled nanocavities can emit quantum correlated photons in the presence of a so-called “modest” nonlinearity, i.e. in absence of localized emitters, thanks to interferences in the coupled cavity system [2–3]. Specifically, we seek to investigate nonlinear phenomena with few photons – less than 10, that is to say in a regime of a strong quantum noise – in coupled nonlinear photonic crystal active nanocavities. This is a nascent research area that may enable a wealth of interesting phenomena ranging from nonequilibrium photon statistics  and few photon bifurcations to non-classical states of light . Experimental signatures of quantum correlations and entanglement close to few photon nonlinear transitions constitutes a major mid to long term goal of this project, with high potential impact in the field of nonlinear and quantum nanophotonics. The current ANR-PRC project UNIQ (Unconventional iNtegrated nanophotonIc sources with Quantum correlations, coordinator: A. GIACOMOTTI) will enable the first steps in this direction.
A. BRAMATI (LKB, Paris)
C. CIUTI (MPQ, Paris)
A. EISFELD (Max Planck, Dresden)
Figure 1: sketw of few photon coupled cavities.
Figure 2: Simulated response of coupled nanolasers under excitation of a short pulse showing the distribution of the population difference between the modes and more generally the distribution of the optical field.
 M. Marconi, J. Javaloyes, P. Hamel, F. Raineri, A. Levenson, and A. M. Yacomotti, Far-from-equilibrium route to superthermal light in bimodal nanolasers, Phys. Rev. X 8, 011013 (2018).
 T. C. H. Liew and V. Savona, Physical Review Letters 104, 183601 (2010).
 M. Bamba, A. Imamog ̆lu, I. Carusotto, and C. Ciuti, Phys. Rev. A 83, 021802 (2011).
 W. Casteels and C. Ciuti, Phys. Rev. A 95, 013812 (2017).