Phase-matched emission from an optically thin medium following one-photon pulse excitation: Energy considerations
- Michigan Center for Theoretical Physics and Physics Department, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040 (United States)
Scully and coworkers [M. O. Scully, E. S. Fry, C. H. R. Oii, and K. Wodkiewicz, Phys. Rev. Lett. 96, 010501 (2006)] demonstrated that there is directional, phase-matched emission following the excitation of an ensemble of atoms by a single-photon pulse. While the phase-matched emission intensity is proportional to the the number of atoms, for optically thin samples the total energy emitted in the phase-matched direction is much less than that radiated in other directions. Moreover, even for optically thin samples, it is necessary to take into account effects related to cooperative decay if energy is to be conserved in the overall emission process. An analytic calculation is presented to show explicitly how cooperative decay reduces the incoherent emission and restores energy conservation in this low-density limit.
- OSTI ID:
- 21541413
- Journal Information:
- Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.035804; (c) 2011 American Institute of Physics; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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