Speaker
Description
Structured light, i.e. light fields with a non-trivial shape in time, space, and polarization, has become a versatile approach to explore fundamental optics effects and develop novel applications in fields such as microscopy, imaging, optical communications, and quantum technologies, to name a few. In this talk, I will first introduce the field of structured light focusing on its applications in quantum photonics.
Following this brief introduction, I will present a few of our recent works on structured light in the quantum domain, which include the advanced modulation of structured photons to perform complex unitary operation on high-dimensional quantum state as well as a so-called quantum frequency conversion process which we control using structured light. In the former, we leverage the spatial modulation ability when multiple consecutive phase-modulation planes are used and show some of its applications to quantum state engineering and sensing. I will also present initial results on implementing these modulations in a scalable, integrated manner through laser-written nanogratings in glass. In the second experiment, we explore the frequency conversion of a single photon from one wavelength to another while simultaneously changing its polarization state to a spatial structure and keeping the entanglement with a partner photon intact. We further show that the preservation of entanglement (non-local) during this process is conditioned upon the classical non-separability (local) of the structured field that drives the process.
