As quick as a flash

Xinyun Cui, Zhihai Wang, Jin-Hui Wu

Abstract We theoretically propose a photonic flash based on a linearly coupled cavity system. Via driving the two side cavities by external fields, it forms a cyclic energy-level diagram and therefore the phase difference between the driving fields acts as a controller of the steady state due to the quantum interference effect. In the optical trimer structure, we show that the perfect photonic flash can be realized in the situation of resonant driving. The perfect photonic flash scheme is furthermore generalized to multiple coupled cavity system, where the cavities with odd and even number turn bright and dark alternatively. Our proposal may be applied for designing the quantum neon and realizing a controllable photonic localization .

George Zebrowski

Kenneth B. Eisenthal, Seymour Siegel

The effects of dipole—dipole resonance transfer on the population and decay of excited donor molecules are discussed. The limitation of the previous treatments of this problem to flash excitation is demonstrated. The present treatment is applicable to systems which have achieved a steady state or have been flashed. Expressions are given for the donor quantum yields, the decay of excited donor molecules for flashed and steady-state systems, and the steady-state population of excited donor molecules.

Adam Becker

Romain Pierrat, Maryvonne Chalony, Dominique Delande +1 more

We study the time dependence of a laser beam transmitted through a cold atomic gas. We show in particular that the balistic beam exhibits a flash behavior when the incident laser is abruptly switch-off.

David Gevaux