Published December 26, 2018 | Version v1
Journal article Open

Lasing in the superradiant crossover regime

  • 1. Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark


A new class of laser, which harnesses coherence in both light and atoms, is possible with ultracold alkaline-earth-metal atoms trapped in an optical lattice inside an optical cavity. Different lasing regimes, including superradiance, superradiant, and conventional lasing, are distinguished by the relative coherence stored in the atoms and in the cavity mode. We analyze the physics in two different experimentally achievable regions of the superradiant lasing regime. Our calculations confirm the narrow linewidth of superradiant lasing for the doubly forbidden clock transition 3P01S0 of 87Sr atoms. Under strong driving of the dipole-forbidden transition 3P11S0 of 88Sr atoms, the superradiant linewidth narrows further due to the coherent excitation of the cavity field.



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NanOQTech – Nanoscale Systems for Optical Quantum Technologies 712721
European Commission