Photon echoes and coherence of luminescent molecules

Ahmed H. Zewail

R. Lefèbvre, Janne Savolainen

Каримуллин Камиль Равкатович, Mikhail Knyazev, Yu. G. Vainer +1 more

A convenient and efficient technique for controlling exact focusing of several noncollinear laser beams into the same point of a luminescent sample is proposed for optical photon-echo spectroscopy and four-wave mixing experiments. The technique proposed is based on a confocal luminescence microscope equipped with a sensitive multichannel detector for visualizing samples with a large magnification. The high efficiency of the scheme developed is confirmed by experimental study of photon echo in a polymer film doped with luminescent dye molecules.

В. Смирнов, Г. М. Ермолаева, В. Б. Шилов

A new theoretical model describing the emission and absorption dynamics in an ensemble of molecules under intense coherent pulsed pumping is developed on the basis of the concepts of cooperative light-induced luminescence (CLIL). The CLIL development is described within the framework of formalism of the system density matrix in the space of photon wave functions. It is shown that the fast growth of CLIL relates to the development of coherent states of the quantum field in the area of efficient cooperative interactions of molecules (coherence volume). A system of equations for the calculation of CLIL energy, population of excited states, and optical absorption of the system in dependence on the laser pump energy density is solved. The theoretical results obtained are in good agreement with the experimental data.

Hansruedi Gygax, Ekkehard Görlach, Alexander Rebane +1 more

Takao Fuji, Hitoshi Fukuda, Toshiaki Hattori +1 more