Superradiance in molecular semiconductors

I.M. Lizin, Махвиладзе Тариэль Михайлович, Leonid A. Shelepin

T. Stroucken, S. Haas, Bernd Grote +4 more

A.V. Andreev, Sergei Sheetlin

J. Kühl, Matthias Hübner, Dirk Ammerlahn +8 more

R. Bonifacio, Hans Morawitz

We propose a new cooperative phenomenon: the conversion of the energy stored in a monolayer of fully excited molecules, located at a distance $D\ensuremath{\ll}{\ensuremath{\lambda}}_{f}$ (the fluorescence wave-length) from a metal or doped semiconductor, into the resonant surface-plasmon mode. The effect resembles Dicke's superradiance, with significant modifications---the coherent burst is a propagating surface-polariton mode.

S. V. Goupalov

We propose a design of a spherically symmetric nanostructure consisting of alternate concentric semiconductor and dielectric layers. The exciton states in different semiconductor layers of such a structure interact via the common electromagnetic field of light. We show that, if the exciton states in $N$ semiconductor layers are in resonance with one another, then a superradiant state emerges under optical excitation of such a structure. We discuss the conditions under which superradiance can be observed and show that they strongly depend on the valence-band structure of the semiconductor layers.