Abstract

The interaction of a radiating dipole with a phase conjugate mirror (PCM) is enhanced due to wavefront reversal by the PCM as well as by possible gain. Moreover, decay at two frequencies is predicted when ω_o = ω_m and 4(α_r + α_nr) d/c ≪ 1, where ω_o = free oscillation frequency of the dipole, ω_m = pump frequency of PCM (four-wave mixing), α_r, and α_nr are the radiative and nonradiative decay rates, respectively, and d is the effective distance to the PCM. Decay at multiple frequencies is predicted when 4(α_r + α_nr) d/c ≳ 1. Locking of decay frequencies to the pump frequency is predicted at a critical pump intensity and at a second critical point the dipole gains energy from the PCM.