EIGENMODES OF A RESONATOR WITH ACTIVE MEDIUM

Georges Henry Wagnière

Ewan M. Wright, W. J. Firth

S. K. Joshi, Abhijit Kar Gupta, A. M. Jayannavar

We siudy the wave propagation through a single-channel (single-mode) coherently amplifying disoulered medium A new crossovei length scale is introduced in the icgime ol stiong disoidei and weak amplification We show that in an active medium reflectance anscs due to .synergeticeffect of localization and coherent amplification Oui study reveals that ihe tail ot the Wigner delay lime distribution from a disordered passive medium exhibits a universality in the sense that H is independent ol the nature ol disorder

V. K. Ablekov, Vadim S. Belyaev, V. P. Vasil'ev +3 more

S. De Silvestri, P. Laporta, Vittorio C. Magni +1 more

V.V. Kostenko, Volodymyr M. Kuklin, Eugen V. Poklonskiy

Excitation of electromagnetic waves in a waveguide with a medium, which is a two-level system, is considered. To describe the processes, both classical electrodynamics methods and quantum mechanics methods are used. The nature of the processes under study turns out to depend on the relationship between the Rabi frequency and the line width of the excited wave packet. It is shown that if the field energy density is high, then spatially inhomogeneous Rabi frequencies arise, which leads to oscillatory behavior of the wave field amplitudes. If the levels of the excited field are small, then the dynamics of the two-level quantum system becomes monotonic and the population inversion tends to zero.