Ultralow-power local laser control of the dimer density in alkali-metal   vapors through photodesorption
  Ultralow-power diode-laser radiation is employed to induce photodesorption of cesium from a partially transparent thin-film cesium adsorbate on a solid surface. Using resonant Raman spectroscopy, we demonstrate that this photodesorption process enables an accurate local optical control of the density of dimer molecules in alkali-metal vapors. 
Pankaj K. Jha, Konstantin E. Dorfman, Zhenhuan Yi, Luqi Yuan, Vladimir   A. Sautenkov, Yuri V. Rostovtsev, George R. Welch, ...
physics.atom-ph quant-ph