Controlled absorption and all-optical diode action due to collisions of self-induced-transparency solitons

Abstract

We study inelastic collisions of counter-propagating self-induced transparency solitons in a homogeneously broadened two-level medium. The energy of the pulse can be almost totally absorbed in the medium due to asymmetric collision with a properly chosen control pulse. The medium state thus prepared demonstrates the property of an all-optical diode which transmits pulses from one direction and blocks from another. The saturation process of a controlled absorption effect, local-field correction influence, and the parameter ranges for the diode action are studied as well.

Optical kinks and kink-kink and kink-pulse interactions in resonant two-level media

“…This paper can be considered a continuation of the work by Ponomarenko and Haghgoo [13] and, simultaneously, a development of our previous studies of ultrashort pulses and their interactions in two-level media [15]. In particular, unusual dynamics of matter was reported under asymmetric collisions of self-induced transparency solitons [16] and in the cases of extremely short (subcycle) pulses [17] and chirped pulses [18]. However, contrary to self-induced transparency and other coherent effects which occur for ultrashort pulses, kinks form in the regime of incoherent light-matter interaction when, as stated above, the characteristic time of the input field cannot be considered negligible in comparison to relaxation times.…”

Disorder-induced light trapping enhanced by pulse collisions in one-dimensional nonlinear photonic crystals

“…As previously, we consider the regime of strong disorder and strong nonlinearity. We have studied earlier the interaction of co-and counter-propagating pulses in perfect photonic crystals with relaxing nonlinearity [24] and in dense two-level media [25][26][27]. As far as we know, the influence of disorder on such interaction was not considered in scientific literature yet.…”

Asymmetric bistable reflection and polarization switching in a magnetic nonlinear multilayer structure

“…Therefore, there is an apparent possibility to obtain new nonreciprocal effects in spatially inhomogeneous nonlinear media, including ones with dissipative losses. In such systems, a number of new nonreciprocal phenomena are revealed, among which spectral nonreciprocity, nonreciprocal compression [7], and nonreciprocal dynamics of self-induced transparency solitons [8] can be mentioned.…”