Delay feedback induces drift of multipeaks cavity solitons in VCSEL devices

Localized structures or localized patterns often called cavity solitons are nonlinear stationary bright or dark pulses in spatially extended systems. They have been observed in the transverse section of coherently driven nonlinear optical resonators. They attract a growing interest due to their potential application for all optical control of light. When they are well separated from each other, cavity solitons are independent or randomly distributed in the transverse plane. However, when they are close one to another they start to interact via their oscillating, exponentially decaying tails. This interaction leads to clustering phenomenon. This behavior is relatively well understood. So far however, the inclusion of delay feedback in the dynamics of spatially extended systems is relatively a new area of research.