Hlajenje ujetih nanodelcev z metodo koherentnega sipanja

Optomehanska interakcija med svetlobo in snovjo nam omogoča spremembo trajektorije delca. Tako lahko delec ujamemo v optično past. Ker za to potrebujemo relativno močan svetlobni snop, se bo delec segrel in na neki točki ušel iz pasti. Delce je zato potrebno aktivno hladiti. V članku je predstavljena metoda ujetja makroskopskega delca v optično past in metodo hlajenja preko koherentnega sipanja. Ta metoda omogoča, da delec ohladimo do njegovega osnovnega kvantnega stanja gibanja težišča, kot je bilo nedavno tudi eksperimentalno pokazano.

Cooling of trapped nanoparticles by coherent scattering method

The optomechanical interaction between light and matter allows us to alter the trajectory of a particle, enabling it to be trapped in an optical tweezer. However, since a relatively strong light beam is required for this, the particle will heat up and eventually escape the trap. Therefore, active cooling of the particle is necessary. In this article the method of trapping a macroscopic particle in an optical tweezer and the cooling technique through coherent scattering is presented. This method allows the particle to be cooled down to its quantum ground state of center-of-mass motion, as was recently demonstrated experimentally