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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1993),
  • paper QThH9

Beat radiation from dipoles near a photonic band edge

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Abstract

There has been interest lately in the radiative properties of atoms embedded in photonic band structures.1,2 In a previous work we have presented a general treatment of dipole emission rates in a photonic band structure and have applied the formalism to a single dipole in a simple one-dimensional Kronig-Penney model.2 Here, we would like to consider two nearly identical dipoles detuned from each other such that one dipole has a frequency ωa in the band while the second has a frequency ωb in the gap. We assume that the two dipoles are at approximately the same location—with an interdipole spacing much less than a wavelength—and we assume that they have the same dipole moment μ. We shall show, then, that the system radiates no power into the gap but that the power output at the band frequency expresses beats indicating the presence of the gap atom, even though that atom cannot radiate directly.

© 1993 Optical Society of America

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