Kavli Affiliate: Alireza Marandi
| First 5 Authors: Ryotatsu Yanagimoto, Edwin Ng, Marc Jankowski, Rajveer Nehra, Timothy P. McKenna
| Summary:
Over the last few decades, nonlinear optics has become significantly more
nonlinear, traversing nearly a billionfold improvement in energy efficiency,
with ultrafast nonlinear nanophotonics in particular emerging as a frontier for
combining both spatial and temporal engineering. At present, cutting-edge
experiments in nonlinear nanophotonics place us just above the mesoscopic
regime, where a few hundred photons suffice to trigger nonlinear saturation. In
contrast to classical or deep-quantum optics, the mesoscale is characterized by
dynamical interactions between mean-field, Gaussian, and non-Gaussian quantum
features, all within a close hierarchy of scales. When combined with the
inherent multimode complexity of optical fields, such hybrid quantum-classical
dynamics present theoretical, experimental, and engineering challenges to the
contemporary framework of quantum optics. In this review, we highlight the
unique physics that emerges in multimode nonlinear optics at the mesoscale and
outline key principles for exploiting both classical and quantum features to
engineer novel functionalities. We briefly survey the experimental landscape
and draw attention to outstanding technical challenges in materials, dispersion
engineering, and device design for accessing mesoscopic operation. Finally, we
speculate on how these capabilities might usher in some new paradigms in
quantum photonics, from quantum-augmented information processing to
nonclassical-light-driven dynamics and phenomena to all-optical non-Gaussian
measurement and sensing. The physics unlocked at the mesoscale present
significant challenges and opportunities in theory and experiment alike, and
this review is intended to serve as a guidepost as we begin to navigate this
new frontier in ultrafast quantum nonlinear optics.
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