Features of Excitation of a Two-Level System by Short Nonresonance Laser Pulses

Guzel I. Garnaeva, Leonid A. Nefediev, É. I. Khakimzyanova

S. E. Kumekov

M. G. Arustamyan, Valery Alexandrovich Astapenko

The possibility of the phase control for the excitation of a quantum system in the discrete spectrum under the action of a short high-intensity laser pulse with a controlled phase is theoretically analyzed. The analysis is performed using the example of the simplest two-level system (TLS) employing a numerical solution to equations for the optical Bloch vector. It is demonstrated that the excitation probability and the mean dipole moment of the quantum system, which determine the normal luminescence and the superradiance in the TLS ensemble, respectively, substantially depend on the phase of the laser pulse for relatively short and powerful laser pulses.

Pavel A. Golovinski, Valery Alexandrovich Astapenko, Andrey V. Yakovets

We study theoretically fast transfer of excitons between pairs of coupled quantum dots driven by the optical Stark effect that is produced by a short nonresonant laser pulse. The Schrödinger equation, in which the relative position of energy levels of quantum dot subsystems is time-dependent, is solved numerically. Computer simulation shows a way to achieve efficient excitation transfer by the action of a picosecond laser pulse with a rectangular envelope function.

С. А. Бахрамов, Konstantin N. Drabovich, А. М. Коххаров +2 more

Alexander A. Makarov