Main research topics

The choice of a given resonator is of crucial importance for any kind of laser. For Organic ones, planar waveguides or microcavities are widely used. We introduced and study Vertical External Cavity Surface-emitting Organic Lasers (VECSOLs) and investigate the influence of the resonator properties on the laser dynamics and performances.

Organic laser performances are often limited by the photophysical properties of the dye or semiconductor used. We work in collaboration with organic chemists to have a deeper look on this interplay and to design novel molecules potentially able to produce improved lasing properties.

We are working on a relatively simple theoretical model of organic lasing, in order to extract some photophysical constants from experiments (photolminescence, lasing) and to study in details the influence of the resonator and/or each bi- molecular process on the laser pulse duration for example.

Light concentrators are very simple optical devices able to enhance the brightness of any light source through wavelength conversion (absorbtion/fluorescence). We work on the use of such devices, organic or inorganic, to get high brightness LED systems for illumination purposes, or to be used as pump to excite inorganic lasers.

The physics of organic emitter is very rich: we are also interested in polarization issues in VECSOLs, polaritonic lasing in microcavities, lifetime studies, use of liquid/solid gain medium...