Intracavity optical pumping of J-aggregate microcavity exciton polaritons

Publication Type:

Journal Article

Source:

Phys. Rev. B Condens. Matter, American Physical Society, Volume 82, Issue 3, p.033305 (2010)

ISBN:

0163-1829

Keywords:

2010, 2013 and earlier

Abstract:

We demonstrate intracavity optical pumping of J-aggregate microcavity exciton polaritons. The use of ultrathin layer-by-layer J-aggregate thin
films as the strongly coupled exciton medium allows for inclusion of a
thermally evaporated luminescent cavity spacer layer, through which the
lower-branch exciton-polariton states are resonantly pumped. We present a
measurement of the lower-branch exciton-polariton occupation in
room-temperature microcavity devices containing J-aggregated molecular
thin films under low-density steady-state excitation. The observed
exciton-polariton occupation shows a Maxwell-Boltzmann distribution at
T=300 K, indicating thermalization of exciton polaritons in the lower
energy branch. This device design enables us to propose a new type of
“polariton laser” architecture for microcavity exciton polaritons.