Nonlinear quantum optics: from photonic chips to nanoscale

Quantum optics has a range of applications including secure communication, precise sensing, and ultrafast computing. Optical nonlinearities have long been utilised as a source of quantum light. Nowadays, nonlinear quantum photonics is undergoing rapid miniaturisation, moving from bulk optics, to photonic chips, and, more recently, to nano-scale components. This transition is what this talk is about.