HQOC/ITAMP Joint Quantum Sciences Seminar Wednesday, March 8, 2017 4:00 PM, Jefferson 250 Prof. Ortwin Hess, Imperial College London “Controlled Single-Molecule Strong Coupling and Stopped-Light Lasing in Nanoplasmonic Cavities” Recent progress in nanophotonics and metamaterials physics is now allowing us to ‘look inside the wavelength’ and exploit active nano-plasmonics and metamaterials as a new route to quantum many-body optics on the nanoscale [1,2]. At the same time, lasers have become smaller and smaller, reaching with the demonstration of plasmonic nanolasing, scales much smaller than the wavelength of the light they emit [3,4]. Here we discuss recent progress in the study of quantum emitters and quantum gain in nanoplasmonic systems and deliberate on approaches. We combine classical and quantum many-body theory and simulation to describe and model the spatio-temporal dynamics of the optical near field and plasmon polaritons coupled with quantum emitters in nano- plasmonic cavities. We reveal the mechanisms that have allowed us to experimentally reach the strong-coupling regime at room temperature and in ambient conditions [5]. Moreover, it will be demonstrated that applying thenanoplasmonic stopped-light lasing principle to surface- plasmon polaritons (SPP) facilitates trapped/condensed non-equilibrium surface-plasmon polaritons at stopped-light singularities, providing an entry point to SPP-condensation. [1] O. Hess et al. Nature Materials 11, 573 (2012). [2] O. Hess et al., Science 339, 654 (2013). [3] T. Pickering, et al., Nature Communications 5, 4971 (2014). [4]S. Wuestner, T. Pickering, J. M. Hamm, A. F. Page, A. Pusch and O. Hess, Faraday Discuss. 178, 307 (2015). [5] R. Chikkaraddy, B. de Nijs, F. Benz, S. J. Barrow, O. A. Sherman, E. Rosta, A. Demetriadou, P. Fox, O. Hess and J.J. Baumberg, Nature 535, 127(2016). Student Presentation from 4:00-4:10 PM Refreshments Served from 4:10-4:30 PM Guest Presentation from 4:30-6:00 PM -- Clare Ploucha Faculty Assistant to Professors Lukin & Greiner and their labs Department of Physics 17 Oxford St., Lyman 324A Cambridge, MA 02138 P. (617) 496-2544