Polariton lasing in organic semiconductor microcavities
A microcavity is a structure in which an optically active semiconductor is placed between two highly reflective mirrors. Such a structure confines photons into a series of discreet optical modes. Within the so-called ‘strong-coupling regime’ the photons trapped in the cavity can couple with the excited states of a semiconductor within the cavity and form new states termed ‘cavity-polaritons’. Cavity polaritons are a fascinating test-bed for fundamental physics, and can also have applications in ultra-low threshold lasers, on-chip communications elements and ultra-fast optical switches. In this project, you will develop microcavities that contain organic semiconductor thin films and assess their relative lasing threshold when optically pumped. You will explore a wide range of materials, with your objective being the fabrication of polariton lasers that operate at very low thresholds. As part of the project, you will collaborate with our colleagues at the Universities of Southampton and St. Andrews as part of a new multi-million pound ’Hybrid Polaritonics’ project. This is an experimental research project suitable for Physicists, Electronic Engineers or Physical Chemists who wish to build a career in the field of photonics and optoelectronics.