Laser spectroscopy with nanometric gas cells : distance dependence of   atom-surface interaction and collisions under confinement
  The high sensitivity of Laser Spectroscopy has made possible the exploration of atomic resonances in newly designed "nanometric" gas cells, whose local thickness varies from 20nm to more than 1000 nm. Following the initial observation of the optical analogous of the coherent Dicke microwave narrowing, the newest prospects include the exploration of long-range atom surface van der Waals interaction with spatial resolution in an unprecedented range of distances, modification of atom dielectric resonant coupling under the influence of the coupling between the two neighbouring dielectric media, and even the possible modification of interatomic collisions processes under the effect of confinement. 
Ismah\`ene Hamdi, Petko Todorov, Alexander Yarovitski, Gabriel Dutier,   Isabelle Maurin, Solomon Saltiel, Yuanyuan Li, Artu...