Cascade optical excitation of an artificial exciton molecule in a coupled quantum dot

Keishiro Goshima, Kazuhiro Komori, Takeyoshi Sugaya, Toshihide Takagahara

Research output: Contribution to journalConference article


We investigated the formation dynamics of the artificial exciton molecule state, which consists of two different excitons confined in each quantum dot of a pair of quantum dots, namely a coupled quantum dot (CQD). By the selective optical excitation of the inherent energy states of two different excitons using two color continuous wave (CW) and pulsed lasers, we successively created Xb excitons and an artificial exciton molecule state, and monitored the photoluminescence, namely the population, of the artificial exciton molecule states. By employing the power dependence of the two colors and the excitation energy dependence, we succeeded in controlling the cascade optical excitation of an artificial exciton molecule.

Original languageEnglish
Pages (from-to)343-346
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number1
Publication statusPublished - 2008 Jun 30
Event15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors, HCIS15 - Tokyo, Japan
Duration: 2007 Jul 232007 Jul 27


ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this