Ratnesh Gupta, Multiphoton processes in an optical nanofiber based light-matter interface

Speaker: Ratnesh Gupta, Light-Matter Interactions (Nic Chormaic) Unit

Title: Multiphoton processes in an optical nanofiber based light-matter interface

Abstract: Interfacing of optical nanofibres (ONFs) with cold atoms to probe and study quantum behaviour have been of great interest in recent years. ONFs offer diffraction-free propagation, and allows strong interaction between guided light with surrounding atoms. Furthermore, the tight confinement of the electromagnetic modes guided through the ONF offers the potential of probing nonlinear processes in atoms at ultralow-power levels. The presence of an ONF not only modifies the spontaneous emission of nearby atoms, but also provide an efficient channel to collect information on interactions between atoms and light. With these features, ONFs are an attractive tool to investigate multi-photon processes in atoms. We aim to explore the possibility of the generation of nonclassically correlated photon-pairs and heralded single photons via four-wave mixing (FWM) in such an all fibre-atom system.

After the seminar (17:00-17:30) join us for discussion with soft drinks and free pizza!