Solid lines: exciton-polariton kinetic distribution functions of the GaN microcavity under non-resonant cw optical pumping at 300 K. The pump power densities used are (a) 1000 W/cm2 and (b) 40000 W/cm2. Black points and open circles show the values of the distribution function for the lowest energy states (assuming the exciting light spot is 50 µm radius) for pump densities of 1000 W/cm2 and 40000 W/cm2, respectively. Dashed line shows the Bose-Einstein polariton distribution function of the same microcaity assuming a vanishing chemical potential. Inset shows the radiative efficiency of the polariton laser versus the pumping power density at 300 K.
© 2003 The Materials Research Society
