The interaction between cavity modes and optical transitions leads to new coupled light-matter states in which the energy is periodically exchanged between the matter states and the optical mode. Here we present experimental evidence of optical strong coupling between modes of individual sub-wavelength metamaterial nanocavities and engineered optical transitions in semiconductor heterostructures. We show that this behaviour is generic by extending the results from the mid-infrared to the near-infrared. Using mid-infrared structures, we demonstrate that the light-matter coupling occurs at the (...) single resonator level and with extremely small interaction volumes. We calculate a mode volume of 4.9 × 10 from which we infer that only ~2,400 electrons per resonator participate in this energy exchange process. (shrink)

In this article, we look at the contested role of in-house lawyers in regulated organisations in the financial sector. A recent Financial Conduct Authority consultation on whether to designate the head of legal of banks, insurance companies and other financial firms as ‘Senior Managers’ and the decision which flowed from it, reflected a flawed view of lawyers as a neutral technocracy of mere legal technicians; we show how the FCA’s decision is potentially damaging to the public interest and failed to (...) take into account that in-house lawyers are often important decision-makers and influencers within their organisations. We put the case for an alternative view; that in-house lawyers are professionals, with agency that requires them to act in accordance with ethical norms and means they should be made more accountable for their conduct. (shrink)