2014/02/06 by Gennady A. Koganov, Koganov, Gennady A., Reuben Shuker +1
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Optics (physics.optics) #physics.atom-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1402.1376
arxiv created 2014/02/06 · arxiv updated 2014/02/07
A scheme for active second harmonics generation is suggested. The system comprises N three-level atoms in ladder configuration, situated into resonant cavity. It is found that the system can lase in either superradiant or subradiant regime, depending on the number of atoms N. When N passes some critical value the transition from the super to subradiance occurs in a phase-transition-like manner. Stability study of the steady state supports this conclusion.