All-optical flow control of a polariton condensate using non-resonant   excitation
  The precise adjustment of the polariton condensate flow under incoherent excitation conditions is an indispensable prerequisite for polariton-based logic gate operations. In this report, an all-optical approach for steering the motion of a polariton condensate using only non-resonant excitation is demonstrated. We create arbitrarily shaped functional potentials by means of a spatial light modulator, which allow for tailoring the condensate state and guiding a propagating condensate along reconfigurable pathways. Additional numerical simulations confirm the experimental observations and elucidate the interaction effects between background carriers and polariton condensates. 
Johannes Schmutzler (1), Przemyslaw Lewandowski (2), Marc A{\ss}mann   (1), Dominik Niemietz (1), Stefan Schumacher (2), Mar...
cond-mat.mes-hall