Malpuech, G., Di Carlo, A., Kavokin, A., Baumberg, J.J., Zamfirescu, M. and Lugli, P.
Room temperature polariton lasers based on GaN microcavities
Applied Physics Letters, 81, (3), . (doi:10.1063/1.1494126).
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The critical temperature for Bose condensation of exciton polaritons in an AlGaN microcavity containing 9 GaN quantum wells is calculated to be T = 460 K. We have modeled the kinetics of polaritons in such a microcavity device using the two-dimensional Boltzmann equation. Room-temperature lasing is found with a threshold as small as 100 mW. The kinetic blocking of polariton relaxation that prevents formation of the Bose-condensed phase of polaritons at low temperatures disappears at high temperatures, especially in n-doped samples. Thus, GaN microcavities are excellent candidates for realization of room-temperature polariton lasers.
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