Title: Molecules in hollow-core photonic bandgap fibres Speaker: Jan Hald, Danish Fundamental Metrology Time: Thursday, November 25, 15.15 to 16.00 Place: Fysisk Auditorium Abstract: Both high intensity and long interaction length is needed for nonlinear spectroscopy on weak molecular transitions. The narrow core of hollow-core fibres allows for high intensity maintained over a distance limited basically by the practical problem of filling gas into the fibre. Various spectroscopic techniques are studied in gas-filled hollow-core fibres, including saturated absorption, velocity selective spectroscopy on ?cold? molecules, and microwave-optical double resonance. The dynamics of gas filling is investigated, and possible applications as well as limitations within gas sensing and optical frequency standards are discussed. Jacob Sherson and Aurélien Dantan Coffee, tea and cake will be served at 15.05 ----------------------------------- Aurelien Dantan Ion Trap Group Department of Physics and Astronomy University of Aarhus Ny Munkegade, bygn. 1520 8000 Aarhus Denmark +4589423602