1202.3096 (Y. Y. Kuznetsova et al.)

Excitation Energy Dependence of the Exciton Inner Ring    [PDF]

Y. Y. Kuznetsova, J. R. Leonard, L. V. Butov, J. Wilkes, E. A. Muljarov, K. L. Campman, A. C. Gossard

We report on the excitation energy dependence of the inner ring in the
exciton emission pattern. The contrast of the inner ring is found to decrease
with lowering excitation energy. Excitation by light tuned to the direct
exciton resonance is found to effectively suppress excitation-induced heating
of indirect excitons and facilitate the realization of a cold and dense exciton
gas. The excitation energy dependence of the inner ring is explained in terms
of exciton transport and cooling.

View original: http://arxiv.org/abs/1202.3096