Superconducting single photon detectors for quantum optics and spectroscopy up to 2.5 microns

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Quantum optics has been a major contributor to the exploration and understanding of some of the most extraordinary concepts in physics, such as photon antibunching and coalescence, vacuum Rabi oscillations, entanglement, and teleportation. These and other related concepts are now being exploited as resources to develop new and enhanced technologies in the fields of metrology, sensing, communications and computations. ***In recent years, our team has made seminal contributions in connection to these technologies: we have developed single photon emitters with large optical dipole moments, we have applied and refined coherent control of quantum states in single hole systems, we have resolved for the first time the quantum statistics of electric fields (including that of the vacuum) on subcycle time scales, we have developed new tools and methods for precision spectroscopy, we apply techniques of epitaxial growth to deposit isotopically enriched semiconductors as well as new group-IV materials for both classical and quantum technologies. ***To support these activities and the research program described in this proposal, our team requests a high quantum efficiency Superconducting Single Photon Detector (SSPD) system optimized for fast temporal response and high count rates in the wavelength range from 1.6 to 2.5 microns. Currently unavailable at Polytechnique and the Université de Montréal, this important tool will provide the means to address several outstanding opportunities in the field of quantum optics and semiconductor quantum technologies: the realization of highly-coherent quantum light sources for silicon quantum photonics, the demonstration of the first high-sensitivity single-photon detector operating in the 1-20 THz band, and the development of new class of materials where two-dimensional gas of high-mobility light-holes holds great promise for applications in quantum technologies. ***By enabling research of the highest caliber at the forefront in quantum optics and semiconductor quantum technologies, this instrumentation will serve to further enhance Canada's research competitiveness and play an important role in attracting and training HQP of the highest quality. *****